The strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential

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dc.creatorD'Elia, Massimo
dc.creatorDi Renzo, Francesco
dc.creatorLombardo, Maria Paola
dc.date2007-05-25
dc.date2007-06-07
dc.date.accessioned2026-07-07T11:16:22Z
dc.date.available2026-07-07T11:16:22Z
dc.descriptionWe explore the highly non-perturbative hot region of the QCD phase diagram close to Tc by use of an imaginary chemical potential mu which avoids the sign problem. The number density and the quark number susceptibility are consistent with a critical behaviour associated with the transition line in the negative mu^2 half-plane. We compare the analytic continuation of these results with various phenomenological models, none of which provides a satisfactory description of data, a failure on which we make some comments. These results complement and extend the information obtained via the analysis of the susceptibilities evaluated at zero mu, yielding a simple description of the candidate strongly interacting QGP phase. As a byproduct of our analysis we investigate the Polyakov loop and its hermitian conjugate. Our data offer a vivid evidence of the importance of the complex nature of the functional integral measure, which results in L (mu) ne \bar L(mu) for a real chemical potential.
dc.description9 pages, 10 figures; one typo fixed, beta value specified
dc.identifierhttps://arxiv.org/abs/0705.3814
dc.identifierhttp://arxiv.org/abs/0705.3814
dc.identifierPhys.Rev.D76:114509,2007
dc.identifierdoi:10.1103/PhysRevD.76.114509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192652
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleThe strongly interacting Quark Gluon Plasma, and the critical behaviour of QCD at imaginary chemical potential
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