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

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 [Phys. Rev. Lett. 126, 232001 (2021) to the case of nonzero μS, focusing on the line of strangeness neutrality. We present results up to μB/T≤3.5 on the strangeness neutral line $⟨S⟩=0$ in the temperature range 130 MeV≤T≤280 MeV. We also extrapolate the finite baryon density equation of state to small nonzero 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 time slices.