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Lattice QCD equation of state at finite chemical potential from an alternative expansion scheme

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arxiv 2102.06660 v1 pith:2MMTFNOF submitted 2021-02-12 hep-lat nucl-th

Lattice QCD equation of state at finite chemical potential from an alternative expansion scheme

classification hep-lat nucl-th
keywords expansionchemicalcoefficientsequationlatticestatefinitepotential
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Taylor expansion of the equation of state of QCD suffers from shortcomings at chemical potentials $\mu_B \geq (2-2.5)T$. First, one faces difficulties inherent in performing such an expansion with a limited number of coefficients; second, higher order coefficients determined from lattice calculations suffer from a poor signal-to-noise ratio. In this work, we present a novel scheme for extrapolating the equation of state of QCD to finite, real chemical potential that can extend its reach further than previous methods. We present continuum extrapolated lattice results for the new expansion coefficients and show the thermodynamic observables up to $\mu_B/T\le3.5$.

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Cited by 9 Pith papers

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