Resummed lattice QCD equation of state at finite baryon density: strangeness neutrality and beyond

Abstract

We calculate a resummed equation of state with lattice QCD simulations at imaginary chemical potentials. This work presents a generalization of the scheme introduced in 2102.06660 to the case of non-zero ${\mu }_S$, focusing on the line of strangeness neutrality. We present results up to ${\mu }_B/T\le 3.5$ on the strangeness neutral line $⟨S⟩=0$ in the temperature range $130\mathrm{MeV}\le \mathrm{T}\le 280\mathrm{MeV}$. We also extrapolate the finite baryon density equation of state to small non-zero values of the strangeness-to-baryon ratio $R=⟨S⟩/⟨B⟩$. We perform a continuum extrapolation using lattice simulations of the 4stout-improved staggered action with 8, 10, 12 and 16 timeslices.

Comments: 15 pages, 12 figures; v2: contains ancillary files with tabulated data