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Título:
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Effective chiral lagrangian from QCD at nonzero chemicalpotential
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Autores:
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Álvarez Estrada, Ramón F. ;
Gómez Nicola, Ángel
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science, 1995-07-27
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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: 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 start from the euclidean QCD action for gluons and massless quarks with N_c colours at finite baryon chemical potential ?_B and zero temperature. For ?_B of the order of external momenta o(p) we derive an euclidean effective real chiral lagrangian at finite ?_B, up to and including o(pˆ4), in terms of Goldstone Bosons (GB), in the large N_c limit, including gluon contributions. Our effective action generalizes non-trivially the one obtained for ?_B = 0 by previous authors, and it includes new ?_B -dependent terms. In particular, a topological term ?_B N_B is found, N_B being the baryon number in terms of GB fields with the correct normalization factor. Physical implications of the remaining ?_B -dependent terms are discussed briefly.
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En línea:
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https://eprints.ucm.es/id/eprint/30677/1/gnicola45libre.pdf
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