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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 (12). pp. 288294. ISSN 03702693

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Official URL: http://dx.doi.org/10.1016/03702693(95)007343
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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 nontrivially 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 

Additional Information:  © 1995 Elsevier Science B.V.. 
Uncontrolled Keywords:  Finitetemperature; Resonance physics; Currentalgebra; Gaugetheories; Quark; Anomalies; Density; Pion 
Subjects:  Sciences > Physics > PhysicsMathematical 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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