Thermal properties of heavy-light quark pseudoscalar and vector mesons
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332008000400011 |
Resumo: | The thermal behaviour of the mass, leptonic decay constant, and width of heavy-light quark peseudoscalar and vector mesons is analized in the framework of thermal Hilbert moment QCD sum rules. In all the cases, the meson leptonic decay constants decrease with increasing T, and vanish at a critical temperature Tc, while the mesons develop a width which increases dramatically, diverging when T → Tc, where Tc is the temperature for chiral-symmetry restoration. The spectral function becomes a smooth function of the energy. This is interpreted as a signal for deconfinement at T = Tc. In contrast, the thermal masses are stable, except when T → Tc, where the pseudoscalar meson mass increases slightly by 10-20 %, and the vector meson mass decreases by some 20-30 %. |
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Brazilian Journal of Physics |
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Thermal properties of heavy-light quark pseudoscalar and vector mesonsFinite temperature field theoryQCD Sum RulesThe thermal behaviour of the mass, leptonic decay constant, and width of heavy-light quark peseudoscalar and vector mesons is analized in the framework of thermal Hilbert moment QCD sum rules. In all the cases, the meson leptonic decay constants decrease with increasing T, and vanish at a critical temperature Tc, while the mesons develop a width which increases dramatically, diverging when T → Tc, where Tc is the temperature for chiral-symmetry restoration. The spectral function becomes a smooth function of the energy. This is interpreted as a signal for deconfinement at T = Tc. In contrast, the thermal masses are stable, except when T → Tc, where the pseudoscalar meson mass increases slightly by 10-20 %, and the vector meson mass decreases by some 20-30 %.Sociedade Brasileira de Física2008-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332008000400011Brazilian Journal of Physics v.38 n.3b 2008reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332008000400011info:eu-repo/semantics/openAccessDominguez,Cesareo A.Loewe,MarceloRojas,Juan Cristobaleng2008-11-18T00:00:00Zoai:scielo:S0103-97332008000400011Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2008-11-18T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
title |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
spellingShingle |
Thermal properties of heavy-light quark pseudoscalar and vector mesons Dominguez,Cesareo A. Finite temperature field theory QCD Sum Rules |
title_short |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
title_full |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
title_fullStr |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
title_full_unstemmed |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
title_sort |
Thermal properties of heavy-light quark pseudoscalar and vector mesons |
author |
Dominguez,Cesareo A. |
author_facet |
Dominguez,Cesareo A. Loewe,Marcelo Rojas,Juan Cristobal |
author_role |
author |
author2 |
Loewe,Marcelo Rojas,Juan Cristobal |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Dominguez,Cesareo A. Loewe,Marcelo Rojas,Juan Cristobal |
dc.subject.por.fl_str_mv |
Finite temperature field theory QCD Sum Rules |
topic |
Finite temperature field theory QCD Sum Rules |
description |
The thermal behaviour of the mass, leptonic decay constant, and width of heavy-light quark peseudoscalar and vector mesons is analized in the framework of thermal Hilbert moment QCD sum rules. In all the cases, the meson leptonic decay constants decrease with increasing T, and vanish at a critical temperature Tc, while the mesons develop a width which increases dramatically, diverging when T → Tc, where Tc is the temperature for chiral-symmetry restoration. The spectral function becomes a smooth function of the energy. This is interpreted as a signal for deconfinement at T = Tc. In contrast, the thermal masses are stable, except when T → Tc, where the pseudoscalar meson mass increases slightly by 10-20 %, and the vector meson mass decreases by some 20-30 %. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332008000400011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332008000400011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332008000400011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.38 n.3b 2008 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734864720986112 |