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Título:
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The QCD topological charge and its thermal dependence: the role of the eta'
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Autores:
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Gómez Nicola, Ángel ;
Ruiz de Elvira Carrascal, Jacobo ;
Vioque Rodríguez, Andrea
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Tipo de documento:
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texto impreso
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Editorial:
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Springer, 2019-11-14
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física-Modelos matemáticos
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Materia = Ciencias: Física: Física matemática
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Tipo = Artículo
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Resumen:
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We analyze the contribution of the 7/(958) meson in the first two non-trivial moments of the QCD topological charge distribution, namely, the topological susceptibility and the fourth-order cumulant of the vacuum energy density. We perform our study within U(3) Chiral Perturbation Theory up to next -to-next -to-leading order in the combined chiral and large-Ne expansion. We also describe the temperature dependence of these two quantities and compare them with previous analyses in the literature. In particular, we discuss the validity of the thermal scaling of the topological susceptibility with the quark condensate, which is intimately connected with a Ward Identity relating both quantities. We also consider isospin breaking corrections from the vacuum misalignment at leading order in the U(3) framework.
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En línea:
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https://eprints.ucm.es/id/eprint/59519/1/gnicola58libre%2BCC.pdf
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