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Álvarez Estrada, Ramón F. and Gómez Nicola, Ángel
(1995)
*Effective chiral lagrangian from QCD at nonzero chemical
potential.*
Physics letters B, 355
(1-2).
pp. 288-294.
ISSN 0370-2693

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Official URL: http://dx.doi.org/10.1016/0370-2693(95)00734-3

## Abstract

We start from the euclidean QCD action for gluons and massless quarks with N_c colours at finite baryon chemical potential μ_B and zero temperature. For μ_B of the order of external momenta o(p) we derive an euclidean effective real chiral lagrangian at finite μ_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 μ_B = 0 by previous authors, and it includes new μ_B -dependent terms. In particular, a topological term μ_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 μ_B -dependent terms are discussed briefly.

Item Type: | Article |
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Additional Information: | © 1995 Elsevier Science B.V.. |

Uncontrolled Keywords: | Finite-temperature; Resonance physics; Current-algebra; Gauge-theories; Quark; Anomalies; Density; Pion |

Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |

ID Code: | 30677 |

Deposited On: | 05 Jun 2015 10:00 |

Last Modified: | 10 Dec 2018 15:10 |

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