| dc.creator | Gómez Dumm, Daniel Alberto | |
| dc.creator | Blaschke, David | |
| dc.creator | Grunfeld, Ana Gabriela | |
| dc.creator | Scoccola, Norberto Nerio | |
| dc.date | 2006-06 | |
| dc.date | 2021-10-01T15:11:45Z | |
| dc.date.accessioned | 2023-07-15T03:34:31Z | |
| dc.date.available | 2023-07-15T03:34:31Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/126040 | |
| dc.identifier | issn:1550-7998 | |
| dc.identifier | issn:1550-2368 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7466231 | |
| dc.description | We consider the phase diagram of two-flavor quark matter under neutron star constraints for two nonlocal, covariant quark models within the mean-field approximation. In the first case (Model I) the nonlocality arises from the regularization procedure, motivated by the instanton liquid model, whereas in the second one (Model II) a separable approximation of the one-gluon exchange interaction is applied. We find that Model II predicts a larger quark mass gap and a chiral symmetry breaking (CSB) phase transition line which extends 15–20% further into the phase diagram spanned by temperature (T) and chemical potential (μ). The corresponding critical temperature at μ = 0,T<sub>c</sub>(0) ≃ 140 MeV, is in better accordance to recent lattice QCD results than the prediction of the standard local NJL model, which exceeds 200 MeV. For both Model I and Model II we have considered various coupling strengths in the scalar diquark channel, showing that different low-temperature quark matter phases can occur at intermediate densities: a normal quark matter (NQM) phase, a two-flavor superconducting (2SC) quark matter phase and a mixed 2SC-NQM phase. Although in most cases there is also a gapless 2SC phase, this occurs in general in a small region at nonzero temperatures, thus its effect should be negligible for compact star applications. | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.description | Instituto de Física La Plata | |
| dc.format | application/pdf | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Física | |
| dc.subject | phase diagram | |
| dc.subject | Physics | |
| dc.subject | quark matter | |
| dc.subject | neutral quark matter | |
| dc.title | Phase diagram of neutral quark matter in nonlocal chiral quark models | |
| dc.type | Articulo | |
| dc.type | Articulo | |
