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The critical line of two-flavor QCD at finite isospin or baryon densities from imaginary chemical potentials

Cea, P. and Cosmai, L. and D'Elia, M. and Papa, A. and Sanfilippo, F. (2012) The critical line of two-flavor QCD at finite isospin or baryon densities from imaginary chemical potentials. Physical review. D, Particles, fields, gravitation, and cosmology, 85 . 094512 -094523. ISSN 1550-7998

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Abstract

We determine the (pseudo)critical lines of QCD with two degenerate staggered fermions at nonzero temperature and quark or isospin density, in the region of imaginary chemical potentials; analytic continuation is then used to prolongate to the region of real chemical potentials. We obtain an accurate determination of the curvatures at zero chemical potential, quantifying the deviation between the case of finite quark and of finite isospin chemical potential. Deviations from a quadratic dependence of the pseudocritical lines on the chemical potential are clearly seen in both cases: we try different extrapolations and, for the case of nonzero isospin chemical potential, confront them with the results of direct Monte Carlo simulations. Finally we find that, as for the finite quark density case, an imaginary isospin chemical potential can strengthen the transition till turning it into strong first order.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 04 Nov 2013 10:23
Last Modified: 04 Nov 2013 10:23
URI: http://eprints.adm.unipi.it/id/eprint/1557

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