RT Journal Article
T1 Effective chiral lagrangian from QCD at nonzero chemical potential
A1 Fernández Álvarez-Estrada, Ramón
A1 Gómez Nicola, Ángel
AB We start from the euclidean QCD action for gluons and massless quarks with N_c colours at finite baryon chemical potential ps and zero temperature. For μ_B of the order of external momenta o(p) we derive an euclidean effective real chiral lagrangian at finite pe, up to and including o(p^4), 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.
PB Elsevier
SN 0370-2693
YR 1995
FD 1995-07
LK https://hdl.handle.net/20.500.14352/59850
UL https://hdl.handle.net/20.500.14352/59850
LA eng
NO © 1995 Elsevier Science B.V. We thank Prof. A. Dobado for useful information. The financial supports of CICYT (Proyecto AEN93-0776), Spain, and Human Capital and Mobility Programme, European Commission (Contract ERBCHRXCT940423), Brussels, are acknowledged.
NO Comisión Interministerial de Ciencia y Tecnología (CICYT), España
NO Human Capital and Mobility Programme, European Commission
NO Unión Europea (UE)
DS Docta Complutense
RD 9 abr 2025