Series representation; Pade' approximants and critical behavior in QCD at nonzero T and muB
Abstract
We discuss the analytic continuation beyond μ/T 1 in QCD at nonzero T and μ by use of the Pade' approximants. The slope of the critical line obtained in this way increases at large μ with respect to the second order Taylor result.In the hot phase Pade' and Taylor approximants coincide, suggesting a very large, and possibly infinite, radius of convergence of the Taylor series in this thermodynamic region.
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