Schematic model for QCD at finite temperature

The simplest version of a class of toy models for QCD is presented. It is a Lipkin-type model, for the quark-antiquark sector, and, for the gluon sector, gluon pairs with spin zero are treated as elementary bosons. The model restricts to mesons with spin zero and to few baryonic states. The correspo...

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Detalles Bibliográficos
Autores principales:	Jesgarz, S., Hess, Peter O., Civitarese, Enrique Osvaldo, Reboiro, Marta
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2002
Materias:	Física QCD energy spectrum Quantum phase transitions
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126286 https://journals.aps.org/prc/abstract/10.1103/PhysRevC.66.045207
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126286
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física QCD energy spectrum Quantum phase transitions
spellingShingle	Física QCD energy spectrum Quantum phase transitions Jesgarz, S. Hess, Peter O. Civitarese, Enrique Osvaldo Reboiro, Marta Schematic model for QCD at finite temperature
topic_facet	Física QCD energy spectrum Quantum phase transitions
description	The simplest version of a class of toy models for QCD is presented. It is a Lipkin-type model, for the quark-antiquark sector, and, for the gluon sector, gluon pairs with spin zero are treated as elementary bosons. The model restricts to mesons with spin zero and to few baryonic states. The corresponding energy spectrum is discussed. We show that ground state correlations are essential to describe physical properties of the spectrum at low energies. Quantum phase transitions are described in an effective manner, by using coherent states. The appearance of a Goldstone boson for large values of the interaction strength is discussed, as related to a collective state. The formalism is extended to consider finite temperatures. The partition function is calculated, in an approximate way, showing the convenience of the use of coherent states. The energy density, heat capacity, and transitions from the hadronic phase to the quark-gluon plasma are calculated.
format	Articulo Articulo
author	Jesgarz, S. Hess, Peter O. Civitarese, Enrique Osvaldo Reboiro, Marta
author_facet	Jesgarz, S. Hess, Peter O. Civitarese, Enrique Osvaldo Reboiro, Marta
author_sort	Jesgarz, S.
title	Schematic model for QCD at finite temperature
title_short	Schematic model for QCD at finite temperature
title_full	Schematic model for QCD at finite temperature
title_fullStr	Schematic model for QCD at finite temperature
title_full_unstemmed	Schematic model for QCD at finite temperature
title_sort	schematic model for qcd at finite temperature
publishDate	2002
url	http://sedici.unlp.edu.ar/handle/10915/126286 https://journals.aps.org/prc/abstract/10.1103/PhysRevC.66.045207
work_keys_str_mv	AT jesgarzs schematicmodelforqcdatfinitetemperature AT hesspetero schematicmodelforqcdatfinitetemperature AT civitareseenriqueosvaldo schematicmodelforqcdatfinitetemperature AT reboiromarta schematicmodelforqcdatfinitetemperature
bdutipo_str	Repositorios
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Schematic model for QCD at finite temperature

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