Chiral phase transition in a covariant nonlocal NJL model

The properties of the chiral phase transition at finite temperature and chemical potential are investigated within a nonlocal covariant extension of the Nambu-Jona-Lasinio model based on a separable quark-quark interaction. We consider both the situation in which the Minkowski quark propagator has p...

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Detalles Bibliográficos
Autores principales: General, I., Gómez Dumm, Daniel Alberto, Scoccola, Norberto Nerio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Física
Chiral phase transition
Finite temperature and/or density
Nonlocal nambu-jona-lasinio model
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/95134
https://ri.conicet.gov.ar/11336/71720
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-95134
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Chiral phase transition
Finite temperature and/or density
Nonlocal nambu-jona-lasinio model
spellingShingle Física
Chiral phase transition
Finite temperature and/or density
Nonlocal nambu-jona-lasinio model
General, I.
Gómez Dumm, Daniel Alberto
Scoccola, Norberto Nerio
Chiral phase transition in a covariant nonlocal NJL model
topic_facet Física
Chiral phase transition
Finite temperature and/or density
Nonlocal nambu-jona-lasinio model
description The properties of the chiral phase transition at finite temperature and chemical potential are investigated within a nonlocal covariant extension of the Nambu-Jona-Lasinio model based on a separable quark-quark interaction. We consider both the situation in which the Minkowski quark propagator has poles at real energies and the case where only complex poles appear. In the literature, the latter has been proposed as a realization of confinement. In both cases, the behaviour of the physical quantities as functions of T and μis found to be quite similar. In particular, for low values of T the chiral transition is always of first order and, for finite quark masses, at certain "end point" the transition turns into a smooth crossover. In the chiral limit, this "end point" becomes a "tricritical" point. Our predictions for the position of these points are similar, although somewhat smaller, than previous estimates. Finally, the relation between the deconfining transition and chiral restoration is also discussed.
format Articulo
Articulo
author General, I.
Gómez Dumm, Daniel Alberto
Scoccola, Norberto Nerio
author_facet General, I.
Gómez Dumm, Daniel Alberto
Scoccola, Norberto Nerio
author_sort General, I.
title Chiral phase transition in a covariant nonlocal NJL model
title_short Chiral phase transition in a covariant nonlocal NJL model
title_full Chiral phase transition in a covariant nonlocal NJL model
title_fullStr Chiral phase transition in a covariant nonlocal NJL model
title_full_unstemmed Chiral phase transition in a covariant nonlocal NJL model
title_sort chiral phase transition in a covariant nonlocal njl model
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/95134
https://ri.conicet.gov.ar/11336/71720
work_keys_str_mv AT generali chiralphasetransitioninacovariantnonlocalnjlmodel
AT gomezdummdanielalberto chiralphasetransitioninacovariantnonlocalnjlmodel
AT scoccolanorbertonerio chiralphasetransitioninacovariantnonlocalnjlmodel
bdutipo_str Repositorios
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