Hot quark matter and (proto-) neutron stars

In the first part of this paper, we use a nonlocal extension of the three-flavor Polyakov-Nambu-Jona-Lasinio model, which takes into account flavor-mixing, momentum dependent quark masses, and vector interactions among quarks, to investigate the possible existence of a spinodal region (determined by...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Malfatti, Germán, Orsaria, Milva Gabriela, Contrera, Gustavo Aníbal, Weber, Fridolin, Ranea Sandoval, Ignacio Francisco
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132231
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132231
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
spellingShingle Física
Malfatti, Germán
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, Fridolin
Ranea Sandoval, Ignacio Francisco
Hot quark matter and (proto-) neutron stars
topic_facet Física
description In the first part of this paper, we use a nonlocal extension of the three-flavor Polyakov-Nambu-Jona-Lasinio model, which takes into account flavor-mixing, momentum dependent quark masses, and vector interactions among quarks, to investigate the possible existence of a spinodal region (determined by the vanishing of the speed of sound) in the QCD phase diagram and determine the temperature and chemical potential of the critical end point. In the second part of the paper, we investigate the quark-hadron composition of baryonic matter at zero as well as nonzero temperature. This is of great topical interest for the analysis and interpretation of neutron star merger events such as GW170817. With this in mind, we determine the composition of proto-neutron star matter for entropies and lepton fractions that are typical of such matter. These compositions are used to delineate the evolution of proto-neutron stars to neutron stars in the baryon-mass versus gravitational-mass diagram. The hot stellar models turn out to contain significant fractions of hyperons and isobars but no deconfined quarks. The latter are found to exist only in cold neutron stars.
format Articulo
Articulo
author Malfatti, Germán
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, Fridolin
Ranea Sandoval, Ignacio Francisco
author_facet Malfatti, Germán
Orsaria, Milva Gabriela
Contrera, Gustavo Aníbal
Weber, Fridolin
Ranea Sandoval, Ignacio Francisco
author_sort Malfatti, Germán
title Hot quark matter and (proto-) neutron stars
title_short Hot quark matter and (proto-) neutron stars
title_full Hot quark matter and (proto-) neutron stars
title_fullStr Hot quark matter and (proto-) neutron stars
title_full_unstemmed Hot quark matter and (proto-) neutron stars
title_sort hot quark matter and (proto-) neutron stars
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/132231
work_keys_str_mv AT malfattigerman hotquarkmatterandprotoneutronstars
AT orsariamilvagabriela hotquarkmatterandprotoneutronstars
AT contreragustavoanibal hotquarkmatterandprotoneutronstars
AT weberfridolin hotquarkmatterandprotoneutronstars
AT raneasandovalignaciofrancisco hotquarkmatterandprotoneutronstars
bdutipo_str Repositorios
_version_ 1764820456112652289

Ejemplares similares