Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models

In this paper we detail the thermodynamics of two flavor nonlocal Polyakov–Nambu–Jona-Lasinio models for different parametrizations of the quark interaction regulators. The structure of the model is upgraded in order to allow for terms in the quark selfenergy which violate Lorentz invariance due to...

Descripción completa

Detalles Bibliográficos
Autores principales: Benić, Sanjin, Blaschke, David, Contrera, Gustavo Aníbal, Horvatić, Davor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Física
Physics
Instanton
Rho meson
Critical phenomena
Meson
Pion
Thermal quantum field theory
Quantum electrodynamics
Lorentz covariance
Quark
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126077
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126077
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Physics
Instanton
Rho meson
Critical phenomena
Meson
Pion
Thermal quantum field theory
Quantum electrodynamics
Lorentz covariance
Quark
spellingShingle Física
Physics
Instanton
Rho meson
Critical phenomena
Meson
Pion
Thermal quantum field theory
Quantum electrodynamics
Lorentz covariance
Quark
Benić, Sanjin
Blaschke, David
Contrera, Gustavo Aníbal
Horvatić, Davor
Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
topic_facet Física
Physics
Instanton
Rho meson
Critical phenomena
Meson
Pion
Thermal quantum field theory
Quantum electrodynamics
Lorentz covariance
Quark
description In this paper we detail the thermodynamics of two flavor nonlocal Polyakov–Nambu–Jona-Lasinio models for different parametrizations of the quark interaction regulators. The structure of the model is upgraded in order to allow for terms in the quark selfenergy which violate Lorentz invariance due to the presence of the medium. We examine the critical properties, the phase diagram as well as the equation of state. Furthermore, some aspects of the Mott effect for pions and sigma mesons are discussed explicitly within a nonlocal Polyakov–Nambu–Jona-Lasinio model. In particular, we continued the meson polarization function in the complex energy plane and under certain approximations, we were able to extract the imaginary part as a function of the meson energy. We were not able to calculate the dynamical meson mass, and therefore resorted to a technical study of the temperature dependence of the meson width by replacing the meson energy with the temperature dependent spatial meson mass. Our results show that while the temperature behavior of the meson widths is qualitatively the same for a wide class of covariant regulators, the special case where the nonlocal interactions are introduced via the instanton liquid model singles out with a drastically different behavior.
format Articulo
Articulo
author Benić, Sanjin
Blaschke, David
Contrera, Gustavo Aníbal
Horvatić, Davor
author_facet Benić, Sanjin
Blaschke, David
Contrera, Gustavo Aníbal
Horvatić, Davor
author_sort Benić, Sanjin
title Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
title_short Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
title_full Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
title_fullStr Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
title_full_unstemmed Medium induced Lorentz symmetry breaking effects in nonlocal Polyakov–Nambu–Jona-Lasinio models
title_sort medium induced lorentz symmetry breaking effects in nonlocal polyakov–nambu–jona-lasinio models
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/126077
work_keys_str_mv AT benicsanjin mediuminducedlorentzsymmetrybreakingeffectsinnonlocalpolyakovnambujonalasiniomodels
AT blaschkedavid mediuminducedlorentzsymmetrybreakingeffectsinnonlocalpolyakovnambujonalasiniomodels
AT contreragustavoanibal mediuminducedlorentzsymmetrybreakingeffectsinnonlocalpolyakovnambujonalasiniomodels
AT horvaticdavor mediuminducedlorentzsymmetrybreakingeffectsinnonlocalpolyakovnambujonalasiniomodels
bdutipo_str Repositorios
_version_ 1764820450079145984

Ejemplares similares