Towards finite density QCD with Taylor expansions

Details Towards finite density QCD with Taylor expansions Towards finite density QCD with Taylor expansions

2010-09-27

arxiv.org/abs/1009.5211v2

Phys.Lett.B698:256-264,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 6 figures; minor clarifying changes, version to be published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2011.03.013

Convergence properties of Taylor expansions of observables, which are also used in lattice QCD calculations at non-zero chemical potential, are analyzed in an effective N_f = 2+1 flavor Polyakov-quark-meson model. A recently developed algorithmic technique allows the calculation of higher-order Taylor expansion coefficients in functional approaches. This novel technique is for the first time applied to an effective N_f = 2+1 flavor Polyakov-quark-meson model and the findings are compared with the full model solution at finite densities. The results are used to discuss prospects for locating the QCD phase boundary and a possible critical endpoint in the phase diagram.

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