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The QCD equation of state to $\mathcal{O}(\mu_B^4)$ · Around

2014

The QCD equation of state to $\mathcal{O}(\mu_B^4)$

Hegde, Prasad

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We present results from an ongoing calculation of the QCD equation of state at finite baryon chemical potential $\mu_B$.

We use the method of Taylor expansions to circumvent the sign problem and calculate the expansion coefficients to sixth order using HISQ fermions.
We work at two lattice spacings, namely $N_\tau=6$ and 8 and, though we do not take the continuum limit, demonstrate that cutoff effects remain under control.
We also use our results to construct an equation of state along the freeze-out curve.

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