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Título:
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Minimum of eta/s and the phase transition of the linear sigma model in the large-N limit
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Autores:
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Dobado González, Antonio ;
Llanes Estrada, Felipe José ;
Torres Rincón, Juan M.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2009-12
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Dimensiones:
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application/pdf
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Nota general:
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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
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Tipo = Artículo
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Resumen:
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We reexamine the possibility of employing the viscosity over entropy density ratio as a diagnostic tool to identify a Phase transition in hadron physics to the strongly coupled quark-gluon plasma and other circumstances where direct measurement of the order parameter or the free energy may be difficult. It has been conjectured that the minimum of eta/s does indeed occur at the phase transition. We now make a careful assessment in a controlled theoretical framework, the linear sigma model at large N, and indeed find that the minimum of eta/s occurs near the second-order phase transition of the model due to the rapid variation of the order parameter (here the sigma vacuum expectation value) at a temperature slightly smaller than the critical one.
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En línea:
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https://eprints.ucm.es/id/eprint/21236/1/DobadoAntonio014libre.pdf
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