PRD: Field theory, general methods

Flavor-changing decays of the top quark in 5D warped models

2016-08-05T10:00:00+00:00

Author(s): Alfonso Díaz-Furlong, Mariana Frank, Nima Pourtolami, Manuel Toharia, and Reyna Xoxocotzi

We study flavor-changing neutral current decays of the top quark in the context of general warped extra dimensions, where the five-dimensional (5D) metric is slightly modified from 5D anti–de Sitter ( ${AdS}_{5}$ ). These models address the Planck-electroweak hierarchies of the Standard Model and can obey al…

[Phys. Rev. D 94, 036001] Published Fri Aug 05, 2016

Towards a complete $\mathrm{Δ}(27)×SO(10)$ SUSY GUT

2016-07-29T10:00:00+00:00

Author(s): Fredrik Björkeroth, Francisco J. de Anda, Ivo de Medeiros Varzielas, and Stephen F. King

We propose a renormalizable model based on $Δ (27)$ family symmetry with an $S O (10)$ grand unified theory leading to a novel form of spontaneous geometrical $C P$ violation. The symmetries, including $Δ (27)$ and $Z_{9} \times Z_{12} \times Z_{4}^{R}$ , are broken close to the grand unified theory breaking scale to yield the minimal super…

[Phys. Rev. D 94, 016006] Published Fri Jul 29, 2016

High resolution nonperturbative light-front simulations of the true muonium atom

Henry Lamm and Richard F. Lebed — 2016-07-28T10:00:00+00:00

Author(s): Henry Lamm and Richard F. Lebed

Through the development of a parallel code called tmswift, an extensive light-front quantization study of the nonperturbative spectrum of the bound state $(μ^{+} μ^{-})$ , true muonium, has been performed. Using Padé approximants, it has been possible to extract continuum and infinite-cutoff limits for the si…

[Phys. Rev. D 94, 016004] Published Thu Jul 28, 2016

Lattice constraints on the thermal photon rate

J. Ghiglieri, O. Kaczmarek, M. Laine, and F. Meyer — 2016-07-28T10:00:00+00:00

Author(s): J. Ghiglieri, O. Kaczmarek, M. Laine, and F. Meyer

We estimate the photon production rate from an SU(3) plasma at temperatures of about $1.1 T_{c}$ and $1.3 T_{c}$ . Lattice results for the vector current correlator at spatial momenta $k \sim (2 - 6) T$ are extrapolated to the continuum limit and analyzed with the help of a polynomial interpolation for the corresponding s…

[Phys. Rev. D 94, 016005] Published Thu Jul 28, 2016

Equation of state and transition temperatures in the quark-hadron hybrid model

Akihisa Miyahara, Yuhei Torigoe, Hiroaki Kouno, and Masanobu Yahiro — 2016-07-26T10:00:00+00:00

Author(s): Akihisa Miyahara, Yuhei Torigoe, Hiroaki Kouno, and Masanobu Yahiro

We analyze the equation of state of $2 + 1$ flavor lattice QCD at zero baryon density by constructing a simple quark-hadron hybrid model that has both quark and hadron components simultaneously. We calculate the hadron and quark contributions separately and parameterize those to match with lattice QCD d…

[Phys. Rev. D 94, 016003] Published Tue Jul 26, 2016

Is there room for $CP$ violation in the top-Higgs sector?

V. Cirigliano, W. Dekens, J. de Vries, and E. Mereghetti — 2016-07-21T10:00:00+00:00

Author(s): V. Cirigliano, W. Dekens, J. de Vries, and E. Mereghetti

We discuss direct and indirect probes of chirality-flipping couplings of the top quark to Higgs and gauge bosons, considering both $C P$ -conserving and $C P$ -violating observables, in the framework of the Standard Model effective field theory. In our analysis we include current and prospective constraints…

[Phys. Rev. D 94, 016002] Published Thu Jul 21, 2016

Parametric instability of classical Yang-Mills fields in an expanding geometry

Shoichiro Tsutsui, Teiji Kunihiro, and Akira Ohnishi — 2016-07-18T10:00:00+00:00

Author(s): Shoichiro Tsutsui, Teiji Kunihiro, and Akira Ohnishi

We investigate the instability of a classical Yang-Mills field in an expanding geometry under a color magnetic background field within the linear regime. We consider homogeneous, boost-invariant, and time-dependent color magnetic fields simulating the glasma configuration. We introduce the conformal…

[Phys. Rev. D 94, 016001] Published Mon Jul 18, 2016

Localized direct $CP$ violation for ${B}^{±}→{ρ}^{0}(ω){π}^{±}→{π}^{+}{π}^{−}{π}^{±}$ in QCD factorization

Chao Wang, Zhen-Yang Wang, Zhen-Hua Zhang, and Xin-Heng Guo — 2016-06-30T10:00:00+00:00

Author(s): Chao Wang, Zhen-Yang Wang, Zhen-Hua Zhang, and Xin-Heng Guo

We study the localized direct $C P$ violation in the hadronic decays $B^{\pm} \to ρ^{0} (ω) π^{\pm} \to π^{+} π^{-} π^{\pm}$ , including the effect caused by an interesting mechanism involving the charge symmetry violating mixing between $ρ^{0}$ and $ω$ in the QCD factorization approach. We find that $ρ − ω$ mixing makes the localized integrated $C P$ as…

[Phys. Rev. D 93, 116008] Published Thu Jun 30, 2016

Precise determination of the low-energy hadronic contribution to the muon $g−2$ from analyticity and unitarity: An improved analysis

B. Ananthanarayan, Irinel Caprini, Diganta Das, and I. Sentitemsu Imsong — 2016-06-28T10:00:00+00:00

Author(s): B. Ananthanarayan, Irinel Caprini, Diganta Das, and I. Sentitemsu Imsong

The two-pion low-energy contribution to the anomalous magnetic moment of the muon, $a_{μ} \equiv (g - 2)_{μ} / 2$ , expressed as an integral over the modulus squared of the pion electromagnetic form factor, brings a relatively large contribution to the theoretical error, since the low accuracy of experimental measureme…

[Phys. Rev. D 93, 116007] Published Tue Jun 28, 2016

${π}^{0}−η−{η}^{′}$ mixing in a generalized multiquark interaction scheme

A. A. Osipov, B. Hiller, and A. H. Blin — 2016-06-24T10:00:00+00:00

Author(s): A. A. Osipov, B. Hiller, and A. H. Blin

We investigate the isospin symmetry breaking effects within a recently derived Nambu-Jona-Lasinio related model by fitting the measured pseudoscalar meson masses and weak decay couplings $f_{π}$ , $f_{K}$ . Our model contains the next to leading order terms in the $1 / N_{c}$ expansion of the effective multiquark Lagr…

[Phys. Rev. D 93, 116005] Published Fri Jun 24, 2016

Low-dimensional approach to pair production in an oscillating electric field: Application to bandgap graphene layers

I. Akal, R. Egger, C. Müller, and S. Villalba-Chávez — 2016-06-24T10:00:00+00:00

Author(s): I. Akal, R. Egger, C. Müller, and S. Villalba-Chávez

The production of particle-antiparticle pairs from the quantum field theoretic ground state in the presence of an external electric field is studied. Starting with the quantum-kinetic Boltzmann-Vlasov equation in four-dimensional spacetime, we obtain the corresponding equations in lower dimensionali…

[Phys. Rev. D 93, 116006] Published Fri Jun 24, 2016

Combined heavy-quark symmetry and large-${N}_{c}$ operator analysis for 2-body counterterms in the chiral Lagrangian with $D$ mesons and charmed baryons

Daris Samart, Chakrit Nualchimplee, and Yupeng Yan — 2016-06-09T10:00:00+00:00

Author(s): Daris Samart, Chakrit Nualchimplee, and Yupeng Yan

In this work we construct a chiral SU(3) Lagrangian with $D$ mesons of spin $J^{P} = 0^{-}$ and $J^{P} = 1^{-}$ and charmed baryons of spin $J^{P} = 1 / 2^{+}$ and $J^{P} = 3 / 2^{+}$ . There are 42 leading two-body counterterms involving two charmed baryon fields and two $D$ meson fields in the constructed Lagrangian. The heavy-quark spin symmetr…

[Phys. Rev. D 93, 116004] Published Thu Jun 09, 2016

Drell-Yan process as an avenue to test a noncommutative standard model at the Large Hadron Collider

Selvaganapathy J, Prasanta Kumar Das, and Partha Konar — 2016-06-07T10:00:00+00:00

Author(s): Selvaganapathy J, Prasanta Kumar Das, and Partha Konar

We study the Drell-Yan process at the Large Hadron Collider in the presence of the noncommutative extension of the standard model. Using the Seiberg-Witten map, we calculate the production cross section to first order in the noncommutative parameter $Θ_{μ ν}$ . Although this idea has been evolving for a lo…

[Phys. Rev. D 93, 116003] Published Tue Jun 07, 2016

Question of Lorentz violation in muon decay

J. P. Noordmans, C. J. G. Onderwater, H. W. Wilschut, and R. G. E. Timmermans — 2016-06-06T10:00:00+00:00

Author(s): J. P. Noordmans, C. J. G. Onderwater, H. W. Wilschut, and R. G. E. Timmermans

Possibilities to test the Lorentz invariance of the weak interaction in muon decay are considered. We derive the direction-dependent muon-decay rate with a general Lorentz-violating addition to the $W$ -boson propagator. We discuss measurements of the directional and boost dependence of the Michel para…

[Phys. Rev. D 93, 116001] Published Mon Jun 06, 2016

Quark number holonomy and confinement-deconfinement transition

Kouji Kashiwa and Akira Ohnishi — 2016-06-06T10:00:00+00:00

Author(s): Kouji Kashiwa and Akira Ohnishi

We propose a new quantity which describes the confinement-deconfinement transition based on topological properties of QCD. The quantity which we call the quark number holonomy is defined as the integral of the quark number susceptibility along the closed loop of $θ$ where $θ$ is the dimensionless imagin…

[Phys. Rev. D 93, 116002] Published Mon Jun 06, 2016

QCD sum rule study of a charged bottom-strange scalar meson

C. M. Zanetti, M. Nielsen, and K. P. Khemchandani — 2016-05-26T10:00:00+00:00

Author(s): C. M. Zanetti, M. Nielsen, and K. P. Khemchandani

Using the QCD sum rule approach, we investigate the possible four-quark structure for the new observed $B_{s}^{0} π^{\pm}$ narrow structure (D0). We use a diquak-antidiquark scalar current and work to the order of $m_{s}$ in full QCD, without relying on $1 / m_{Q}$ expansion. Our study indicates that although it is possible …

[Phys. Rev. D 93, 096011] Published Thu May 26, 2016

Electric conductivity of a hot hadron gas from a kinetic approach

Moritz Greif, Carsten Greiner, and Gabriel S. Denicol — 2016-05-26T10:00:00+00:00

Author(s): Moritz Greif, Carsten Greiner, and Gabriel S. Denicol

We calculate the electric conductivity of a gas of relativistic particles with isotropic cross sections using the Boltzmann equation as the starting point. Our analysis is restricted to elastic collisions. We show the perfect agreement with previously published numerical results for a massless quark…

[Phys. Rev. D 93, 096012] Published Thu May 26, 2016

Symmetry preserving truncations of the gap and Bethe-Salpeter equations

2016-05-24T10:00:00+00:00

Author(s): Daniele Binosi, Lei Chang, Joannis Papavassiliou, Si-Xue Qin, and Craig D. Roberts

Ward-Green-Takahashi (WGT) identities play a crucial role in hadron physics, e.g. imposing stringent relationships between the kernels of the one- and two-body problems, which must be preserved in any veracious treatment of mesons as bound states. In this connection, one may view the dressed gluon-q…

[Phys. Rev. D 93, 096010] Published Tue May 24, 2016

Chiral spin-$3/2$ particles in a medium

José F. Nieves and Sarira Sahu — 2016-05-23T10:00:00+00:00

Author(s): José F. Nieves and Sarira Sahu

We consider the propagation of a chiral spin- $3 / 2$ particle in a background medium using the thermal field theory (TFT) method, in analogy to the cases of a spin- $1 / 2$ fermion (e.g., a neutrino) and the photon. We present a systematic decomposition of the thermal self-energy, from which the dispersion r…

[Phys. Rev. D 93, 096009] Published Mon May 23, 2016

$CPT$, $CP$, and $C$ transformations of fermions, and their consequences, in theories with $B−L$ violation

Susan Gardner and Xinshuai Yan — 2016-05-20T10:00:00+00:00

Author(s): Susan Gardner and Xinshuai Yan

We consider the transformation properties of fermions under the discrete symmetries $C P T$ , $C P$ , and $C$ in the presence of $B - L$ violation. We thus generalize the analysis of the known properties of Majorana neutrinos, probed via neutrinoless double beta decay, to include the case of Dirac fermions with $B - \dots$

[Phys. Rev. D 93, 096008] Published Fri May 20, 2016

Distinctive ultraviolet structure of extra-dimensional Yang-Mills theories by integration of heavy Kaluza-Klein modes

I. García-Jiménez, H. Novales-Sánchez, and J. J. Toscano — 2016-05-19T10:00:00+00:00

Author(s): I. García-Jiménez, H. Novales-Sánchez, and J. J. Toscano

One-loop Standard Model observables produced by virtual heavy Kaluza-Klein fields play a prominent role in the minimal model of universal extra dimensions. Motivated by this aspect, we integrate out all the Kaluza-Klein heavy modes coming from the Yang-Mills theory set on a spacetime with an arbitra…

[Phys. Rev. D 93, 096007] Published Thu May 19, 2016

Threshold expansion of the three-particle quantization condition

Maxwell T. Hansen and Stephen R. Sharpe — 2016-05-11T10:00:00+00:00

Author(s): Maxwell T. Hansen and Stephen R. Sharpe

We recently derived a quantization condition for the energy of three relativistic particles in a cubic box [M. T. Hansen and S. R. Sharpe, Phys. Rev. D 90, 116003 (2014); M. T. Hansen and S. R. Sharpe, Phys. Rev. D 92, 114509 (2015)]. Here we use this condition to study the energy level closest to t…

[Phys. Rev. D 93, 096006] Published Wed May 11, 2016

Updated $1/{N}_{c}$ expansion analysis of $[56,{2}^{+}]$ and $[70,{ℓ}^{+}]$ baryon multiplets

N. Matagne and Fl. Stancu — 2016-05-05T10:00:00+00:00

Author(s): N. Matagne and Fl. Stancu

The mass spectra of the $[56, 2^{+}]$ and $[70, ℓ +]$ multiplets, both belonging to the $N = 2$ band, are reviewed in the $1 / N_{c}$ expansion method. Previous studies, separately made for each multiplet, are presently updated to the 2014 Particle Data Group. The mass formula, including corrections up to $O (1 / N_{c})$ and fi…

[Phys. Rev. D 93, 096004] Published Thu May 05, 2016

Instantaneous Bethe-Salpeter kernel for the lightest pseudoscalar mesons

Wolfgang Lucha and Franz F. Schöberl — 2016-05-05T10:00:00+00:00

Author(s): Wolfgang Lucha and Franz F. Schöberl

Starting from a phenomenologically successful, numerical solution of the Dyson-Schwinger equation that governs the quark propagator, we reconstruct in detail the interaction kernel that has to enter the instantaneous approximation to the Bethe-Salpeter equation to allow us to describe the lightest p…

[Phys. Rev. D 93, 096005] Published Thu May 05, 2016

Photon propagator in light-shell gauge

Howard Georgi, Greg Kestin, and Aqil Sajjad — 2016-05-04T10:00:00+00:00

Author(s): Howard Georgi, Greg Kestin, and Aqil Sajjad

We derive the photon propagator in light-shell gauge (LSG) $v_{μ} A^{μ} = 0$ , where $v^{μ} = {(1, \hat{r})}^{μ}$ . This gauge is an important ingredient of the light-shell effective theory—an effective theory for describing high energy jet processes on a 2-dimensional spherical shell expanding at the speed of light around the po…

[Phys. Rev. D 93, 096002] Published Wed May 04, 2016

Optomechanical test of the Schrödinger-Newton equation

André Großardt, James Bateman, Hendrik Ulbricht, and Angelo Bassi — 2016-05-04T10:00:00+00:00

Author(s): André Großardt, James Bateman, Hendrik Ulbricht, and Angelo Bassi

The Schrödinger-Newton equation has been proposed as an experimentally testable alternative to quantum gravity, accessible at low energies. It contains self-gravitational terms, which slightly modify the quantum dynamics. Here we show that it distorts the spectrum of a harmonic system. Based on this…

[Phys. Rev. D 93, 096003] Published Wed May 04, 2016

Probabilistic interpretation of compositeness relation for resonances

Zhi-Hui Guo and J. A. Oller — 2016-05-03T10:00:00+00:00

Author(s): Zhi-Hui Guo and J. A. Oller

Bound, antibound and resonance states are associated to poles in the on-shell partial wave amplitudes. We show here that from the residues of the pole a rank 1 projection operator associated with any of these states can be extracted, in terms of which a sum rule related to the composition of the sta…

[Phys. Rev. D 93, 096001] Published Tue May 03, 2016

Light-front holographic QCD with generic dilaton profile

Zhaoheng Guo, Tianbo Liu, and Bo-Qiang Ma — 2016-04-27T10:00:00+00:00

Author(s): Zhaoheng Guo, Tianbo Liu, and Bo-Qiang Ma

We generalize the soft-wall and hard-wall models to a light-front holographic QCD model with a generic dilaton profile. The effective potential induced by a higher power dilaton profile is interpreted as a stronger color confinement at long distance, and it gradually evolves to the hard-wall model w…

[Phys. Rev. D 93, 076010] Published Wed Apr 27, 2016

Lepton flavor violation in hadronic decays of the tau lepton in the simplest little Higgs model

A. Lami, J. Portolés, and P. Roig — 2016-04-21T10:00:00+00:00

Author(s): A. Lami, J. Portolés, and P. Roig

We study lepton flavor violating hadron decays of the tau lepton within the simplest little Higgs model. Namely we consider $τ \to μ (P, V, P P)$ where $P$ and $V$ are short for a pseudoscalar and a vector meson. We find that, in the most positive scenarios, branching ratios for these processes are predicted to b…

[Phys. Rev. D 93, 076008] Published Thu Apr 21, 2016

750 GeV dark pion: Cousin of a dark $G$-parity odd WIMP

Yang Bai, Joshua Berger, and Ran Lu — 2016-04-21T10:00:00+00:00

Author(s): Yang Bai, Joshua Berger, and Ran Lu

We point out a potential common origin of the recently observed 750 GeV diphoton resonance and a weakly interacting massive particle (WIMP) candidate. In a dark QCD sector with an unbroken dark $G$ parity, the diphoton resonance could be a dark $G$ -even pion, while the WIMP could be the lightest dark $G$ -…

[Phys. Rev. D 93, 076009] Published Thu Apr 21, 2016

Solitonic modulation and Lifshitz point in an external magnetic field within Nambu–Jona-Lasinio model

Gaoqing Cao and Anping Huang — 2016-04-20T10:00:00+00:00

Author(s): Gaoqing Cao and Anping Huang

We study the inhomogeneous solitonic modulation of a chiral condensate within the effective Nambu–Jona-Lasinio model when a constant external magnetic field is present. The self-consistent Pauli-Villars regularization scheme is adopted to manipulate the ultraviolet divergence encountered in the ther…

[Phys. Rev. D 93, 076007] Published Wed Apr 20, 2016

Improved analyses for ${μ}^{−}{e}^{−}→{e}^{−}{e}^{−}$ in muonic atoms by contact interactions

Yuichi Uesaka, Yoshitaka Kuno, Joe Sato, Toru Sato, and Masato Yamanaka — 2016-04-18T10:00:00+00:00

Author(s): Yuichi Uesaka, Yoshitaka Kuno, Joe Sato, Toru Sato, and Masato Yamanaka

The charged lepton flavor violating (CLFV) processes of $μ^{-} e^{-} \to e^{-} e^{-}$ decay by four Fermi contact interactions in a muonic atom for various atoms are investigated. The wave functions of bound and scattering state leptons are properly treated by solving Dirac equations with Coulomb interaction of the fin…

[Phys. Rev. D 93, 076006] Published Mon Apr 18, 2016

Appearance of novel modes of $\overline{D}$ mesons with negative velocity in the dual chiral density wave

Daiki Suenaga and Masayasu Harada — 2016-04-11T10:00:00+00:00

Author(s): Daiki Suenaga and Masayasu Harada

We calculate dispersion relations for $\bar{D} (0^{-})$ , ${\bar{D}}^{*} (1^{-})$ , ${\bar{D}}_{0}^{*} (0^{+})$ , and ${\bar{D}}_{1} (1^{+})$ mesons in the dual chiral density wave (DCDW), where the chiral symmetry is spontaneously broken by inhomogeneous chiral condensate. Employing the Bloch’s theorem, we show that all the modes have opposite group velocity to …

[Phys. Rev. D 93, 076005] Published Mon Apr 11, 2016

Spin-one matter fields

M. Napsuciale, S. Rodríguez, Rodolfo Ferro-Hernández, and Selim Gómez-Ávila — 2016-04-08T10:00:00+00:00

Author(s): M. Napsuciale, S. Rodríguez, Rodolfo Ferro-Hernández, and Selim Gómez-Ávila

Spin-one matter fields are relevant both for the description of hadronic states and as potential extensions of the Standard Model. In this work we present a formalism for the description of massive spin-one fields transforming in the $(1, 0) \oplus (0, 1)$ representation of the Lorentz group, based on the cova…

[Phys. Rev. D 93, 076003] Published Fri Apr 08, 2016

Uncertainty estimates of the $σ$-pole determination by Padé approximants

Irinel Caprini, Pere Masjuan, Jacobo Ruiz de Elvira, and Juan José Sanz-Cillero — 2016-04-08T10:00:00+00:00

Author(s): Irinel Caprini, Pere Masjuan, Jacobo Ruiz de Elvira, and Juan José Sanz-Cillero

We discuss the determination of the $f_{0} (500)$ (or $σ$ ) resonance by analytic continuation through Padé approximants of the $π π$ -scattering amplitude from the physical region to the pole in the complex energy plane. The aim is to analyze the uncertainties of the method, having in view the fact that analyti…

[Phys. Rev. D 93, 076004] Published Fri Apr 08, 2016

Constraints on the virtual Compton scattering on the nucleon in a new dispersive formalism

Irinel Caprini — 2016-04-05T10:00:00+00:00

Author(s): Irinel Caprini

The dispersive representation of the virtual Compton forward scattering amplitude has been recently reexamined in connection with the evaluation of the Cottingham formula for the proton-neutron electromagnetic mass difference and the proton radius puzzle. The most difficult part of the analysis is r…

[Phys. Rev. D 93, 076002] Published Tue Apr 05, 2016

Local gauge transformation for the quark propagator in an SU(N) gauge theory

M. Jamil Aslam, A. Bashir, and L. X. Gutiérrez-Guerrero — 2016-04-01T10:00:00+00:00

Author(s): M. Jamil Aslam, A. Bashir, and L. X. Gutiérrez-Guerrero

In an $S U (N)$ gauge field theory, the $n$ -point Green functions, namely, propagators and vertices, transform under the simultaneous local gauge variations of the gluon vector potential and the quark matter field in such a manner that the physical observables remain invariant. In this article, we derive …

[Phys. Rev. D 93, 076001] Published Fri Apr 01, 2016

Shear viscosity over entropy density ratio with extended quasiparticles

M. Horváth and A. Jakovác — 2016-03-29T10:00:00+00:00

Author(s): M. Horváth and A. Jakovác

We consider an effective field theory description of beyond-quasiparticle excitations aiming to associate the transport properties of the system with the spectral density of states. Tuning various properties of the many-particle correlations, we investigate how the robust microscopic features are tr…

[Phys. Rev. D 93, 056010] Published Tue Mar 29, 2016

Understanding QCD at high density from a ${Z}_{3}$-symmetric QCD-like theory

2016-03-28T10:00:00+00:00

Author(s): Hiroaki Kouno, Kouji Kashiwa, Junichi Takahashi, Tatsuhiro Misumi, and Masanobu Yahiro

We investigate QCD at large $μ / T$ by using $Z_{3}$ -symmetric $S U (3)$ gauge theory, where $μ$ is the quark-number chemical potential and $T$ is temperature. We impose the flavor-dependent twist boundary condition on quarks in QCD. This QCD-like theory has the twist angle $θ$ as a parameter, and agrees with QCD when…

[Phys. Rev. D 93, 056009] Published Mon Mar 28, 2016

Test flavor SU(3) symmetry in exclusive ${\mathrm{Λ}}_{c}$ decays

Cai-Dian Lü, Wei Wang, and Fu-Sheng Yu — 2016-03-23T10:00:00+00:00

Author(s): Cai-Dian Lü, Wei Wang, and Fu-Sheng Yu

Flavor SU(3) symmetry is a powerful tool to analyze charmed baryon decays; however, its applicability remains to be experimentally validated. Since there is not much data on $Ξ_{c}$ decays, various exclusive $Λ_{c}$ decays especially the ones into a neutron state are essential for the test of flavor symmetry.…

[Phys. Rev. D 93, 056008] Published Wed Mar 23, 2016

Analysis of the radiative decays ${\mathrm{Σ}}_{Q}→{\mathrm{Λ}}_{Q}γ$ and ${\mathrm{Ξ}}_{Q}^{′}→{\mathrm{Ξ}}_{Q}γ$ in light cone sum rules

T. M. Aliev, T. Barakat, and M. Savcı — 2016-03-18T10:00:00+00:00

Author(s): T. M. Aliev, T. Barakat, and M. Savcı

The light cone sum rules method is used in studying the radiative decays $Σ_{Q} \to Λ_{Q} γ$ and $Ξ_{Q}^{'} \to Ξ_{Q} γ$ . First, the sum rules for the form factor $F_{2} (Q^{2} = 0)$ responsible for these transitions is constructed. Using this result, the decay widths of the above-mentioned decays are calculated and analyzed. A comparison…

[Phys. Rev. D 93, 056007] Published Fri Mar 18, 2016

Analytic Bethe-Salpeter description of the lightest pseudoscalar mesons

Wolfgang Lucha and Franz F. Schöberl — 2016-03-17T10:00:00+00:00

Author(s): Wolfgang Lucha and Franz F. Schöberl

Within the Bethe-Salpeter formalism for instantaneous interactions, we describe, along a totally analytic route, the lightest pseudoscalar mesons by quark-antiquark bound states which show at least three indispensable general features—namely, the (almost) masslessness required for pions and kaons to…

[Phys. Rev. D 93, 056006] Published Thu Mar 17, 2016

Gauge invariance and the physical spectrum in the two-Higgs-doublet model

Axel Maas and Leonardo Pedro — 2016-03-10T10:00:00+00:00

Author(s): Axel Maas and Leonardo Pedro

Observable states are gauge invariant. In a non-Abelian gauge theory, these are necessarily composite operators. We investigate the spectrum of these operators in the two-Higgs-doublet model. For this purpose, we are working along the lines of the Fröhlich-Morchio-Strocchi mechanism to relate the ph…

[Phys. Rev. D 93, 056005] Published Thu Mar 10, 2016

Scattering asymptotic conditions in Euclidean relativistic quantum theory

Gordon J. Aiello and W. N. Polyzou — 2016-03-07T10:00:00+00:00

Author(s): Gordon J. Aiello and W. N. Polyzou

We discuss the formulation of the scattering asymptotic condition as a strong limit in Euclidean quantum theories satisfying the Osterwalder-Schrader axioms. When used with the invariance principle this provides a constructive method to compute scattering observables directly in the Euclidean formul…

[Phys. Rev. D 93, 056003] Published Mon Mar 07, 2016

Higgs boson production and decay in 5D warped models

Mariana Frank, Nima Pourtolami, and Manuel Toharia — 2016-03-07T10:00:00+00:00

Author(s): Mariana Frank, Nima Pourtolami, and Manuel Toharia

We calculate the production and decay rates of the Higgs boson at the LHC in the context of general five-dimensional warped scenarios with a spacetime background modified from the usual ${AdS}_{5}$ , with Standard Model (SM) fields propagating in the bulk. We extend previous work by considering the full fla…

[Phys. Rev. D 93, 056004] Published Mon Mar 07, 2016

Nonperturbative contribution to the strange-antistrange asymmetry of the nucleon sea

Alfredo Vega, Ivan Schmidt, Thomas Gutsche, and Valery E. Lyubovitskij — 2016-03-01T10:00:00+00:00

Author(s): Alfredo Vega, Ivan Schmidt, Thomas Gutsche, and Valery E. Lyubovitskij

We give predictions for the nonperturbative (intrinsic) contribution to the $s (x) - \bar{s} (x)$ asymmetry of the nucleon sea. For this purpose we use different light-front wave functions inspired by the AdS/QCD formalism, together with a model of the nucleon in terms of meson-baryon fluctuations. The hologra…

[Phys. Rev. D 93, 056001] Published Tue Mar 01, 2016

Completing constrained flavor violation: Lepton masses, neutrinos, and leptogenesis

James M. Cline, Alfonso Díaz-Furlong, and Jing Ren — 2016-02-26T10:00:00+00:00

Author(s): James M. Cline, Alfonso Díaz-Furlong, and Jing Ren

Constrained flavor violation (CFV) is a recent proposal for predicting the down-quark Yukawa matrix in terms of those for up quarks and charged leptons. We study the viability of CFV with respect to its predictions for the lepton mass ratios, showing that this remains a challenge, and suggest some p…

[Phys. Rev. D 93, 036009] Published Fri Feb 26, 2016

Radius of the $ρ$ meson determined from its decay constant

A. F. Krutov, R. G. Polezhaev, and V. E. Troitsky — 2016-02-24T10:00:00+00:00

Author(s): A. F. Krutov, R. G. Polezhaev, and V. E. Troitsky

We present a unified model describing electroweak properties of the $π$ and $ρ$ mesons. Using a general method of the relativistic parametrization of matrix elements of local operators, adjusted for the nondiagonal in the total angular momentum case, we calculate the $ρ$ -meson lepton-decay constant $f_{ρ}$ usi…

[Phys. Rev. D 93, 036007] Published Wed Feb 24, 2016

Improved separation of soft and hard components in multiple Coulomb scattering

M. V. Bondarenco — 2016-02-24T10:00:00+00:00

Author(s): M. V. Bondarenco

Evaluation of the angular distribution function of particles scattered in an amorphous medium is improved by deforming the integration path in the Fourier integral representation into the complex plane. That allows us to present the distribution function as a sum of two positive components, soft and…

[Phys. Rev. D 93, 036008] Published Wed Feb 24, 2016

Continuum study of the QCD phase diagram through an OPE-modified gluon propagator

Chao Shi, Yi-Lun Du, Shu-Sheng Xu, Xiao-Jun Liu, and Hong-Shi Zong — 2016-02-18T10:00:00+00:00

Author(s): Chao Shi, Yi-Lun Du, Shu-Sheng Xu, Xiao-Jun Liu, and Hong-Shi Zong

Within the Dyson-Schwinger equation framework, a gluon propagator model incorporating a quark’s feedback through operator product expansion is introduced to investigate the QCD phase diagram in the temperature-chemical-potential ( $T - μ$ ) plane. Partial restoration of chiral symmetry at zero temperature…

[Phys. Rev. D 93, 036006] Published Thu Feb 18, 2016

Resonances at the LHC beyond the Higgs boson: The scalar/tensor case

Wolfgang Kilian, Thorsten Ohl, Jürgen Reuter, and Marco Sekulla — 2016-02-17T10:00:00+00:00

Author(s): Wolfgang Kilian, Thorsten Ohl, Jürgen Reuter, and Marco Sekulla

We study in a bottom-up approach the theoretically consistent description of additional resonances in the electroweak sector beyond the discovered Higgs boson as simplified models. We focus on scalar and tensor resonances. Our formalism is suited for strongly coupled models, but can also be applied …

[Phys. Rev. D 93, 036004] Published Wed Feb 17, 2016

Lorentz and $CPT$ violation in top-quark production and decay

Micheal S. Berger, V. Alan Kostelecký, and Zhi Liu — 2016-02-17T10:00:00+00:00

Author(s): Micheal S. Berger, V. Alan Kostelecký, and Zhi Liu

The prospects are explored for testing Lorentz and $C P T$ symmetry in the top-quark sector. We present the relevant Lagrange density, discuss physical observables, and describe the signals to be sought in experiments. For top-antitop pair production via quark or gluon fusion with subsequent semileptoni…

[Phys. Rev. D 93, 036005] Published Wed Feb 17, 2016

Majorana neutrinos with point interactions

Chengfeng Cai (蔡成丰) and Hong-Hao Zhang (张宏浩) — 2016-02-12T10:00:00+00:00

Author(s): Chengfeng Cai (蔡成丰) and Hong-Hao Zhang (张宏浩)

We propose a realistic model with Majorana neutrinos in the framework of unifying the three generations of fermions by point interactions in an extra dimension. This model can simultaneously explain the origin of fermion generations, fermion masses and mixing, and the smallness of the masses of Majo…

[Phys. Rev. D 93, 036003] Published Fri Feb 12, 2016

Large-$N$ pion scattering at finite temperature: The ${f}_{0}(500)$ and chiral restoration

Santiago Cortés, A. Gómez Nicola, and John Morales — 2016-02-05T10:00:00+00:00

Author(s): Santiago Cortés, A. Gómez Nicola, and John Morales

We consider the $O (N + 1) / O (N)$ nonlinear sigma model for large $N$ as an effective theory for low-energy QCD at finite temperature $T$ , in the chiral limit. At $T = 0$ this formulation provides a good description of scattering data in the scalar channel and dynamically generates the $f_{0} (500)$ pole, the pole posi…

[Phys. Rev. D 93, 036001] Published Fri Feb 05, 2016

Perturbative QCD factorization of $ρ{γ}^{⋆}→ρ$

Ya-lan Zhang, Shan Cheng, Jun Hua, and Zhen-Jun Xiao — 2016-02-05T10:00:00+00:00

Author(s): Ya-lan Zhang, Shan Cheng, Jun Hua, and Zhen-Jun Xiao

In this paper we first demonstrate step by step that the factorization hypothesis is valid at the next-to-leading order (NLO) for the exclusive process $ρ γ^{⋆} \to ρ$ by employing the collinear factorization approach, and then extend this proof to the case of the $k_{T}$ factorization by taking into account the t…

[Phys. Rev. D 93, 036002] Published Fri Feb 05, 2016

Charged lepton flavor violation on target at GeV scale

Wei Liao and Xiao-Hong Wu — 2016-01-27T10:00:00+00:00

Author(s): Wei Liao and Xiao-Hong Wu

We study the lepton flavor violating process, $e + T \to τ + T^{'}$ , at a few GeV. This process can be studied by experiments directing GeV scale electron or positron beams on internal or fixed targets. We study the effects of some low energy lepton flavor violating interactions on this process. We study the sen…

[Phys. Rev. D 93, 016011] Published Wed Jan 27, 2016

Non-boost-invariant solution of relativistic hydrodynamics in $1+3$ dimensions

Yoshitaka Hatta, Bo-Wen Xiao, and Di-Lun Yang — 2016-01-27T10:00:00+00:00

Author(s): Yoshitaka Hatta, Bo-Wen Xiao, and Di-Lun Yang

We present a new solution of relativistic hydrodynamics in $1 + 3$ dimensions which depends on both the transverse coordinate and rapidity. At early times the flow expands dominantly longitudinally in a nonboost-invariant manner, and at late times it expands nearly spherically. These two regimes are sho…

[Phys. Rev. D 93, 016012] Published Wed Jan 27, 2016

Nonrelativistic Banks-Casher relation and random matrix theory for multicomponent fermionic superfluids

Takuya Kanazawa and Arata Yamamoto — 2016-01-25T10:00:00+00:00

Author(s): Takuya Kanazawa and Arata Yamamoto

We apply QCD-inspired techniques to study nonrelativistic $N$ -component degenerate fermions with attractive interactions. By analyzing the singular-value spectrum of the fermion matrix in the Lagrangian, we derive several exact relations that characterize spontaneous symmetry breaking $U (1) \times SU (N) \to Sp (N)$ …

[Phys. Rev. D 93, 016010] Published Mon Jan 25, 2016

Chiral phase transition in ${\mathrm{QED}}_{3}$ at finite temperature and impurity potential

2016-01-20T10:00:00+00:00

Author(s): Pei-Lin Yin, Wei Wei, Hai-Xiao Xiao, Hong-Tao Feng, Xiao-Jun Liu, and Hong-Shi Zong

In a realistic interacting system described by ( $2 + 1$ )-dimensional quantum electrodynamics ( ${QED}_{3}$ ), there is always a certain number of impurities by which fermions are scattered. In general, impurity scattering can generate a finite density of states at the Fermi level, which screens the temporal comp…

[Phys. Rev. D 93, 016009] Published Wed Jan 20, 2016

Chiral phase transition and Schwinger mechanism in a pure electric field

Gaoqing Cao and Xu-Guang Huang — 2016-01-13T10:00:00+00:00

Author(s): Gaoqing Cao and Xu-Guang Huang

We systematically study the chiral symmetry breaking and restoration in the presence of a pure electric field in the Nambu–Jona-Lasinio model at finite temperature and baryon chemical potential. In addition, we also study the effect of the chiral phase transition on the charged pair production due t…

[Phys. Rev. D 93, 016007] Published Wed Jan 13, 2016

Determination of neutrino mass ordering in future $^{76}\mathrm{Ge}$-based neutrinoless double-beta decay experiments

Jue Zhang and Shun Zhou — 2016-01-13T10:00:00+00:00

Author(s): Jue Zhang and Shun Zhou

Motivated by recent intensive experimental efforts on searching for neutrinoless double-beta decays, we perform a detailed analysis of the physics potential of the experiments based on ${}^{76}{Ge}$ . Assuming no signals, current and future experiments could place a 90% lower limit on the half life $T_{1 / 2}^{0 ν} ≳ 4 \times 1…$

[Phys. Rev. D 93, 016008] Published Wed Jan 13, 2016

Diboson excesses in an anomaly free leptophobic left-right model

Kasinath Das, Tianjun Li, S. Nandi, and Santosh Kumar Rai — 2016-01-12T10:00:00+00:00

Author(s): Kasinath Das, Tianjun Li, S. Nandi, and Santosh Kumar Rai

The resonant excesses around 2 TeV reported by the ATLAS Collaboration can be explained in the left-right model, and the tight constraints from lepton plus missing energy searches can be evaded if the $S U (2)_{R}$ gauge symmetry is leptophobic. We, for the first time, propose an anomaly- free leptophobic …

[Phys. Rev. D 93, 016006] Published Tue Jan 12, 2016

Fermion and scalar phenomenology of a two-Higgs-doublet model with ${S}_{3}$

A. E. Cárcamo Hernández, I. de Medeiros Varzielas, and E. Schumacher — 2016-01-11T10:00:00+00:00

Author(s): A. E. Cárcamo Hernández, I. de Medeiros Varzielas, and E. Schumacher

We propose a two-Higgs-doublet model where the symmetry is extended by $S_{3} \otimes Z_{3} \otimes Z_{3}^{'} \otimes Z_{14}$ and the field content is enlarged by extra $S U (2)_{L}$ singlet scalar fields. $S_{3}$ makes the model predictive and leads to viable fermion masses and mixing. The observed hierarchy of the quark masses arises from the $Z_{3}^{'}$ an…

[Phys. Rev. D 93, 016003] Published Mon Jan 11, 2016

Strong three-meson couplings of $J/ψ$ and ${η}_{c}$

Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian, and Silvano Simula — 2016-01-11T10:00:00+00:00

Author(s): Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian, and Silvano Simula

We discuss the strong couplings $g_{P P V}$ and $g_{V V P}$ for vector ( $V$ ) and pseudoscalar ( $P$ ) mesons, at least one of which is a charmonium state $J / ψ$ or $η_{c}$ . The strong couplings are obtained as residues at the poles of suitable form factors, calculated in a broad range of momentum transfers using a dispersion f…

[Phys. Rev. D 93, 016004] Published Mon Jan 11, 2016

Perturbative renormalization of neutron-antineutron operators

Michael I. Buchoff and Michael Wagman — 2016-01-11T10:00:00+00:00

Author(s): Michael I. Buchoff and Michael Wagman

Two-loop anomalous dimensions and one-loop renormalization scheme matching factors are calculated for six-quark operators responsible for neutron-antineutron transitions. When combined with lattice QCD determinations of the matrix elements of these operators, our results can be used to reliably pred…

[Phys. Rev. D 93, 016005] Published Mon Jan 11, 2016

Temperature dependence of dimension-6 gluon operators and their effects on charmonium

HyungJoo Kim, Kenji Morita, and Su Houng Lee — 2016-01-07T10:00:00+00:00

Author(s): HyungJoo Kim, Kenji Morita, and Su Houng Lee

Starting from an earlier representation of the independent dimension-6 gluon operators in terms of color electric and magnetic fields, we estimate their changes near the critical temperature $T_{c}$ using the temperature dependence of the dimension-4 electric and magnetic condensates extracted from pure …

[Phys. Rev. D 93, 016001] Published Thu Jan 07, 2016

Determination of $U(1{)}_{\mathrm{A}}$ restoration from pion and ${a}_{0}$-meson screening masses: Toward the chiral regime

2016-01-07T10:00:00+00:00

Author(s): Masahiro Ishii, Koji Yonemura, Junichi Takahashi, Hiroaki Kouno, and Masanobu Yahiro

We incorporate the effective restoration of $U (1)_{A}$ symmetry in the $2 + 1$ -flavor entanglement Polyakov-loop extended Nambu–Jona-Lasinio (EPNJL) model by introducing a temperature-dependent strength $K (T)$ to the Kobayashi–Maskawa–’t Hooft determinant interaction. $T$ dependence of $K (T)$ is well determined fr…

[Phys. Rev. D 93, 016002] Published Thu Jan 07, 2016

Strong ${D}_{s}^{}{D}_{s}{η}^{(′)}$ and ${B}_{s}^{}{B}_{s}{η}^{(′)}$ vertices from QCD light-cone sum rules

S. S. Agaev, K. Azizi, and H. Sundu — 2015-12-29T10:00:00+00:00

Author(s): S. S. Agaev, K. Azizi, and H. Sundu

The strong $D_{s}^{*} D_{s} η^{(')}$ and $B_{s}^{*} B_{s} η^{(')}$ vertices are studied and the relevant couplings are calculated in the context of the light-cone QCD sum rule method with twist-4 accuracy by including the next-to-leading-order corrections. In the analysis, both the quark and gluon components of the $η$ and $η^{'}$ mesons…

[Phys. Rev. D 92, 116010] Published Tue Dec 29, 2015

Flavored axion-monodromy inflation

Christopher D. Carone, Raymundo Ramos, and Zhen Wang — 2015-12-29T10:00:00+00:00

Author(s): Christopher D. Carone, Raymundo Ramos, and Zhen Wang

The hierarchy of fermion masses in the standard model may arise via the breaking of discrete gauge symmetries. The renormalizable interactions of the flavor-symmetry-breaking potential can have accidental global symmetries that are spontaneously broken, leading to pseudo-Goldstone bosons that may dr…

[Phys. Rev. D 92, 116011] Published Tue Dec 29, 2015

Symmetry breaking effect on the inhomogeneous chiral transition in the magnetic field

R. Yoshiike and T. Tatsumi — 2015-12-28T10:00:00+00:00

Author(s): R. Yoshiike and T. Tatsumi

We study the effect of the change of the current quark mass on the inhomogeneous chiral phase in the QCD phase diagram and discuss the properties of the phase transition using the generalized Ginzburg-Landau expansion. The strong external magnetic field spreads this phase over the low chemical poten…

[Phys. Rev. D 92, 116009] Published Mon Dec 28, 2015

Renormalization group optimized perturbation theory at finite temperatures

Jean-Loïc Kneur and Marcus B. Pinto — 2015-12-23T10:00:00+00:00

Author(s): Jean-Loïc Kneur and Marcus B. Pinto

A recently developed variant of the so-called optimized perturbation theory (OPT), making it perturbatively consistent with renormalization group (RG) properties, RGOPT, was shown to drastically improve its convergence for zero temperature theories. Here the RGOPT adapted to finite temperature is il…

[Phys. Rev. D 92, 116008] Published Wed Dec 23, 2015

Predictions for leptonic mixing angle correlations and nontrivial Dirac $CP$ violation from ${A}_{5}$ with generalized $CP$ symmetry

Jessica Turner — 2015-12-15T10:00:00+00:00

Author(s): Jessica Turner

Using a discrete flavor group, $A_{5}$ , combined with generalized $C P$ , we study the mixing parameter correlations which arise from breaking to residual symmetries in the neutrino $G_{ν} = Z_{2} \times C P$ , and the charged lepton sectors $G_{e} = Z_{2}$ . By focusing on patterns that agree with current experimental data we demonstrat…

[Phys. Rev. D 92, 116007] Published Tue Dec 15, 2015

Relevance of matter and glue dynamics for baryon number fluctuations

Wei-jie Fu and Jan M. Pawlowski — 2015-12-14T10:00:00+00:00

Author(s): Wei-jie Fu and Jan M. Pawlowski

We investigate the impact of the matter and glue dynamics on baryon number fluctuations and the kurtosis of baryon number distribution. This is done within the framework of QCD-improved low-energy effective models. In particular, we include the momentum scale dependence of the quark-meson scattering…

[Phys. Rev. D 92, 116006] Published Mon Dec 14, 2015

Double Higgs boson production and decay in Randall-Sundrum model at hadron colliders

Wen-Juan Zhang, Wen-Gan Ma, Ren-You Zhang, Xiao-Zhou Li, Lei Guo, and Chong Chen — 2015-12-11T10:00:00+00:00

Author(s): Wen-Juan Zhang, Wen-Gan Ma, Ren-You Zhang, Xiao-Zhou Li, Lei Guo, and Chong Chen

We investigate the double Higgs production and decay at the 14 TeV LHC and 33 TeV HE-LHC in both the standard model (SM) and Randall-Sundrum (RS) model. In our calculation we consider reasonably only the contribution of the lightest two Kaluza-Klein (KK) gravitons. We present the integrated cross se…

[Phys. Rev. D 92, 116005] Published Fri Dec 11, 2015

Variational approach to the inhomogeneous chiral phase in quark matter

S. Karasawa and T. Tatsumi — 2015-12-10T10:00:00+00:00

Author(s): S. Karasawa and T. Tatsumi

The inhomogeneous chiral phase is discussed in QCD at finite temperature and/or density. We study the phase diagram on the density-temperature plane by taking into account the effect of the current quark mass by a variational method. We demonstrate that our framework well describes the inhomogeneous…

[Phys. Rev. D 92, 116004] Published Thu Dec 10, 2015

Nonperturbative estimate of the heavy quark momentum diffusion coefficient

A. Francis, O. Kaczmarek, M. Laine, T. Neuhaus, and H. Ohno — 2015-12-09T10:00:00+00:00

Author(s): A. Francis, O. Kaczmarek, M. Laine, T. Neuhaus, and H. Ohno

We estimate the momentum diffusion coefficient of a heavy quark within a pure SU(3) plasma at a temperature of about $1.5 T_{c}$ . Large-scale Monte Carlo simulations on a series of lattices extending up to $192^{3} \times 48$ permit us to carry out a continuum extrapolation of the so-called color-electric imaginary-t…

[Phys. Rev. D 92, 116003] Published Wed Dec 09, 2015

Probing strong electroweak symmetry breaking dynamics through quantum interferometry at the LHC

Hitoshi Murayama, Vikram Rentala, and Jing Shu — 2015-12-07T10:00:00+00:00

Author(s): Hitoshi Murayama, Vikram Rentala, and Jing Shu

We present a new probe of strongly coupled electroweak symmetry breaking at the 14 TeV LHC by measuring a phase shift in the event distribution of the decay azimuthal angles in massive gauge boson scattering. One generically expects a large phase shift in the longitudinal gauge boson scattering ampl…

[Phys. Rev. D 92, 116002] Published Mon Dec 07, 2015

Above-threshold poles in model-independent form factor parametrizations

Benjamín Grinstein and Richard F. Lebed — 2015-12-01T10:00:00+00:00

Author(s): Benjamín Grinstein and Richard F. Lebed

The model-independent parametrization for exclusive hadronic form factors commonly used for semileptonic decays is generalized to allow for the inclusion of above-threshold resonant poles of known mass and width. We discuss the interpretation of such poles, particularly with respect to the analytic …

[Phys. Rev. D 92, 116001] Published Tue Dec 01, 2015

Electronic and nuclear contributions in sub-GeV dark matter scattering: A case study with hydrogen

Jiunn-Wei Chen, Hsin-Chang Chi, C.-P. Liu, Chih-Liang Wu, and Chih-Pan Wu — 2015-11-30T10:00:00+00:00

Author(s): Jiunn-Wei Chen, Hsin-Chang Chi, C.-P. Liu, Chih-Liang Wu, and Chih-Pan Wu

The scattering of sub-GeV dark matter (DM) particles with hydrogen atoms is studied in this paper. The interactions of DM with electrons and nucleons are both included and formulated in a general framework based on nonrelativistic effective field theory. On the assumption of the same dark matter cou…

[Phys. Rev. D 92, 096013] Published Mon Nov 30, 2015

Prospects of constraining the Higgs boson’s $CP$ nature in the tau decay channel at the LHC

Stefan Berge, Werner Bernreuther, and Sebastian Kirchner — 2015-11-25T10:00:00+00:00

Author(s): Stefan Berge, Werner Bernreuther, and Sebastian Kirchner

We investigate how precisely the $C P$ nature of the 125 GeV Higgs boson $h$ , parametrized by a scalar-pseudoscalar Higgs mixing angle $ϕ_{τ}$ , can be determined in $h \to τ^{-} τ^{+}$ decay with subsequent $τ$ -lepton decays to charged prongs at the Large Hadron Collider (LHC). We combine two methods in order to define an o…

[Phys. Rev. D 92, 096012] Published Wed Nov 25, 2015

Lepton and quark mixing patterns from finite flavor symmetries

Chang-Yuan Yao and Gui-Jun Ding — 2015-11-24T10:00:00+00:00

Author(s): Chang-Yuan Yao and Gui-Jun Ding

We perform a systematical and analytical study of lepton mixing which can be derived from the subgroups of $S U (3)$ under the assumption that neutrinos are Dirac particles. We find that type D groups can predict lepton mixing patterns compatible with the experimental data at the $3 σ$ level. The lepton mi…

[Phys. Rev. D 92, 096010] Published Tue Nov 24, 2015

Magnetized effective QCD phase diagram

Alejandro Ayala, C. A. Dominguez, L. A. Hernández, M. Loewe, and R. Zamora — 2015-11-24T10:00:00+00:00

Author(s): Alejandro Ayala, C. A. Dominguez, L. A. Hernández, M. Loewe, and R. Zamora

The QCD phase diagram in the temperature vs quark chemical potential plane is studied in the presence of a magnetic field, using the linear sigma model coupled to quarks. It is shown that the decrease of the couplings with increasing field strength obtained in this model leads to the critical temper…

[Phys. Rev. D 92, 096011] Published Tue Nov 24, 2015

Bottom baryon decays to pseudoscalar meson and pentaquark

Hai-Yang Cheng and Chun-Khiang Chua — 2015-11-23T10:00:00+00:00

Author(s): Hai-Yang Cheng and Chun-Khiang Chua

Based on SU(3) flavor symmetry, we decompose the decay amplitudes of bottom baryon decays to a pseudoscalar meson and an octet (a decuplet) pentaquark in terms of three (two) invariant amplitudes $T_{1}$ and $T_{2, 3}$ ( ${\tilde{T}}_{1}$ and ${\tilde{T}}_{2}$ ) corresponding to external $W$ -emission and internal $W$ -emission diagrams, respect…

[Phys. Rev. D 92, 096009] Published Mon Nov 23, 2015

Functional renormalization group study of the chiral phase transition including vector and axial-vector mesons

Jürgen Eser, Mara Grahl, and Dirk H. Rischke — 2015-11-18T10:00:00+00:00

Author(s): Jürgen Eser, Mara Grahl, and Dirk H. Rischke

The transition in quantum chromodynamics from hadronic matter to the quark-gluon plasma at high temperatures and/or net-baryon densities is associated with the restoration of chiral symmetry and can be investigated in the laboratory via heavy-ion collisions. We study this chiral transition within th…

[Phys. Rev. D 92, 096008] Published Wed Nov 18, 2015

Nonequilibrium fixed points in longitudinally expanding scalar theories: Infrared cascade, Bose condensation, and a challenge for kinetic theory

J. Berges, K. Boguslavski, S. Schlichting, and R. Venugopalan — 2015-11-05T10:00:00+00:00

Author(s): J. Berges, K. Boguslavski, S. Schlichting, and R. Venugopalan

In [Phys. Rev. Lett. 114, 061601 (2015)], we reported on a new universality class for longitudinally expanding systems, encompassing strongly correlated non-Abelian plasmas and $N$ -component self-interacting scalar field theories. Using classical-statistical methods, we showed that these systems share…

[Phys. Rev. D 92, 096006] Published Thu Nov 05, 2015

Remarks on the static dipole-dipole potential at large distances

Matteo Giordano and Enrico Meggiolaro — 2015-11-05T10:00:00+00:00

Author(s): Matteo Giordano and Enrico Meggiolaro

We determine the large-distance behavior of the static dipole-dipole potential for a wide class of gauge theories on nonperturbative grounds, exploiting only general properties of the theory. In the case of QCD, we recover the known results in the regime of small dipole sizes and discuss recent nonp…

[Phys. Rev. D 92, 096007] Published Thu Nov 05, 2015

Hyperon forward spin polarizability ${γ}_{0}$ in baryon chiral perturbation theory

Astrid Hiller Blin, Thomas Gutsche, Tim Ledwig, and Valery E. Lyubovitskij — 2015-11-04T10:00:00+00:00

Author(s): Astrid Hiller Blin, Thomas Gutsche, Tim Ledwig, and Valery E. Lyubovitskij

We present the calculation of the hyperon forward spin polarizability $γ_{0}$ using manifestly Lorentz-covariant baryon chiral perturbation theory including the intermediate contribution of the spin- $3 / 2$ states. As at the considered order the extraction of $γ_{0}$ is a pure prediction of chiral perturbation th…

[Phys. Rev. D 92, 096004] Published Wed Nov 04, 2015

Implications of unitarity and charge breaking minima in a left-right symmetric model

Tanmoy Mondal, Ujjal Kumar Dey, and Partha Konar — 2015-11-04T10:00:00+00:00

Author(s): Tanmoy Mondal, Ujjal Kumar Dey, and Partha Konar

We examine the usefulness of the unitarity conditions in a left-right symmetric model which can translate into giving a stronger constraint on the model parameters together with the criteria derived from vacuum stability and perturbativity. In this light, we demonstrate the bounds on the masses of t…

[Phys. Rev. D 92, 096005] Published Wed Nov 04, 2015

Baryon properties from light-front holographic QCD

Tianbo Liu and Bo-Qiang Ma — 2015-11-03T10:00:00+00:00

Author(s): Tianbo Liu and Bo-Qiang Ma

We investigate the properties of octet and decuplet baryons in a light-front holographic model. By taking into account the effect of nonvanishing quark mass, we obtain the modified light-front wave functions which are applicable at both low and high energy scales. We calculate the spectra, form fact…

[Phys. Rev. D 92, 096003] Published Tue Nov 03, 2015

Simple way to the high-temperature expansion of relativistic Fermi-Dirac integrals

A. S. Khvorostukhin — 2015-11-02T10:00:00+00:00

Author(s): A. S. Khvorostukhin

The pressure of an ideal relativistic Fermi gas is computed as an infinite series for high temperatures at nonzero chemical potentials. The expansion of the particle number density, scalar density, and entropy density as first derivatives of the pressure is also found.

[Phys. Rev. D 92, 096001] Published Mon Nov 02, 2015

Vector meson spectral function and dilepton rate in the presence of strong entanglement effect between the chiral and the Polyakov loop dynamics

Chowdhury Aminul Islam, Sarbani Majumder, and Munshi G. Mustafa — 2015-11-02T10:00:00+00:00

Author(s): Chowdhury Aminul Islam, Sarbani Majumder, and Munshi G. Mustafa

In this work we have reexplored our earlier study on the vector meson spectral function and its spectral property in the form of dilepton rate in a two-flavor Polyakov loop extended Nambu–Jona-Lasinio (PNJL) model in the presence of a strong entanglement between the chiral and Polyakov loop dynamics…

[Phys. Rev. D 92, 096002] Published Mon Nov 02, 2015

Baryogenesis via mesino oscillations

Akshay Ghalsasi, David McKeen, and Ann E. Nelson — 2015-10-29T10:00:00+00:00

Author(s): Akshay Ghalsasi, David McKeen, and Ann E. Nelson

We propose a new mechanism for baryogenesis at the 1–200 MeV scale. Enhancement of charge parity ( $C P$ ) violation takes place via interference between oscillations and decays of mesinos—bound states of a scalar quark and antiquark and their $C P$ conjugates. We present the mechanism in a simplified model…

[Phys. Rev. D 92, 076014] Published Thu Oct 29, 2015

${\mathrm{Λ}}_{b}→J/ψK\mathrm{Ξ}$ decay and the higher order chiral terms of the meson baryon interaction

A. Feijoo, V. K. Magas, A. Ramos, and E. Oset — 2015-10-29T10:00:00+00:00

Author(s): A. Feijoo, V. K. Magas, A. Ramos, and E. Oset

We study the weak decay of the $Λ_{b}$ into $J / ψ K Ξ$ and $J / ψ η Λ$ states, and relate these processes to the $Λ_{b} \to J / ψ \bar{K} N$ decay mode. The elementary weak transition at the quark level proceeds via the creation of a $J / ψ$ meson and an excited $s u d$ system with $I = 0$ , which upon hadronization leads to $\bar{K} N$ or $η Λ$ pairs. The…

[Phys. Rev. D 92, 076015] Published Thu Oct 29, 2015

Probing $CP$ violation systematically in differential distributions

Gauthier Durieux and Yuval Grossman — 2015-10-28T10:00:00+00:00

Author(s): Gauthier Durieux and Yuval Grossman

We revisit the topic of triple-product asymmetries which probe $C P$ violation through differential distributions. We construct distributions with well-defined discrete symmetry properties and characterize the asymmetries formed upon them. It is stressed that the simplest asymmetries may not be optimal…

[Phys. Rev. D 92, 076013] Published Wed Oct 28, 2015

Vacuum structure of vector mesons in QCD

Fabian Rennecke — 2015-10-27T10:00:00+00:00

Author(s): Fabian Rennecke

We study the chiral dynamics of vector mesons in two-flavor QCD in vacuum by utilizing a functional renormalization group approach. This allows us to capture the dynamical transition from the quark-gluon phase at high energies to the hadronic phase at low energies without the necessity of model para…

[Phys. Rev. D 92, 076012] Published Tue Oct 27, 2015

Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory

Elmar P. Biernat, Franz Gross, M. T. Peña, and Alfred Stadler — 2015-10-26T10:00:00+00:00

Author(s): Elmar P. Biernat, Franz Gross, M. T. Peña, and Alfred Stadler

The pion form factor is calculated in the framework of the charge-conjugation invariant covariant spectator theory. This formalism is established in Minkowski space, and the calculation is set up in momentum space. In a previous calculation we included only the leading pole coming from the spectator…

[Phys. Rev. D 92, 076011] Published Mon Oct 26, 2015

Masses of doubly and triply charmed baryons

Ke-Wei Wei (魏科伟), Bing Chen (陈兵), and Xin-Heng Guo (郭新恒) — 2015-10-23T10:00:00+00:00

Author(s): Ke-Wei Wei (魏科伟), Bing Chen (陈兵), and Xin-Heng Guo (郭新恒)

Until now, the first reported doubly charmed baryon $Ξ_{c c}^{+} (3520)$ is still a puzzle. It was discovered and confirmed by SELEX collaboration, but not confirmed by LHCb, BABAR, BELLE, FOCUS, or any other collaboration. In the present paper, by employing Regge phenomenology, we first express the mass of t…

[Phys. Rev. D 92, 076008] Published Fri Oct 23, 2015

Functional renormalization group in a finite volume

Leonard Fister and Jan M. Pawlowski — 2015-10-23T10:00:00+00:00

Author(s): Leonard Fister and Jan M. Pawlowski

We study a $ϕ^{4}$ theory at finite temperature in a finite volume. Quantum, thermal and volume fluctuations are treated with the functional renormalization group. Specifically, we focus on the interplay of temperature and length scales driving the system. We find that thermodynamical observables at fini…

[Phys. Rev. D 92, 076009] Published Fri Oct 23, 2015

Effects of scalar mesons in a Skyrme model with hidden local symmetry

Bing-Ran He, Yong-Liang Ma, and Masayasu Harada — 2015-10-21T10:00:00+00:00

Author(s): Bing-Ran He, Yong-Liang Ma, and Masayasu Harada

We study the effects of light scalar mesons on the Skyrmion properties by constructing and examining a mesonic model including pion, rho meson, and omega meson fields as well as two-quark and four-quark scalar meson fields. In our model, the physical scalar mesons are defined as mixing states of the…

[Phys. Rev. D 92, 076007] Published Wed Oct 21, 2015

Neutrino masses, the $μ$-term, and ${\mathcal{P}\mathcal{S}\mathcal{L}}_{2}(7)$

Gaoli Chen, M. Jay Pérez, and Pierre Ramond — 2015-10-19T10:00:00+00:00

Author(s): Gaoli Chen, M. Jay Pérez, and Pierre Ramond

Using an $S O (10)$ -inspired form for the Dirac neutrino mass, we map the neutrino data to the right-handed neutrino Majorana mass matrix, $M$ , and investigate a special form with seesaw tribimaximal mixing; it predicts a normal hierarchy, and the values of the light neutrino masses. It may be generated b…

[Phys. Rev. D 92, 076006] Published Mon Oct 19, 2015