Evaluation of particle-anti-particle scaled correlation within effective models
Correlations and fluctuations of physical quantities are known to play an important role in phase transitions and critical phenomena. In recent years some experimental attempts were made in the scope of the Beam Energy Scan program to locate a possible critical point in the QCD phase diagram. In thi...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/196546 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.nuclphysa.2019.121655 http://hdl.handle.net/11449/196546 |
| Access Level: | acceso abierto |
| Palabra clave: | Scaled correlation Off-diagonal quark susceptibility Beam Energy Scan data QCD phase diagram |
| Sumario: | Correlations and fluctuations of physical quantities are known to play an important role in phase transitions and critical phenomena. In recent years some experimental attempts were made in the scope of the Beam Energy Scan program to locate a possible critical point in the QCD phase diagram. In this work we use the Nambu Jona-Lasinio model to investigate the off-diagonal quark susceptibility, which is related to the quark anti-quark scaled correlation at the mean field level. We show that this correlation has a significant peak near the critical point and, therefore, may be a useful quantity to measure in experiment. We further study the effects of a repulsive vector coupling, which reduces the strength of the scaled correlation near the critical point. (C) 2019 Elsevier B.V. All rights reserved. |
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