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The crossover line in the $(T, \mu)$-phase diagram of QCD
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abstract
An efficient way to study the QCD phase diagram at small finite density is to extrapolate thermodynamical observables from imaginary chemical potential. The phase diagram features a crossover line starting from the transition temperature already determined at zero chemical potential. In this work we focus on the Taylor expansion of this line up to $\mu^4$ contributions. We present the continuum extrapolation of the crossover temperature based on different observables at several lattice spacings.
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