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

Submitted to ArXiV on February 11 2022, Phys.Rev.Lett. 126 (2021) 23, 232001

Title

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

Authors

Szabolcs Borsanyi, Zoltan Fodor, Jana N. Guenther, Ruben Kara, Paolo Parotto, Attila Pasztor, Claudia Ratti, Kalman K. Szabo

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 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 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.

BibTeX

@article{Borsanyi:2021sxv,
    author = "Bors\'anyi, S. and Fodor, Z. and Guenther, J. N. and Kara, R. and Katz, S. D. and Parotto, P. and P\'asztor, A. and Ratti, C. and Szab\'o, K. K.",
    title = "{Lattice QCD equation of state at finite chemical potential from an alternative expansion scheme}",
    eprint = "2102.06660",
    archivePrefix = "arXiv",
    primaryClass = "hep-lat",
    doi = "10.1103/PhysRevLett.126.232001",
    journal = "Phys. Rev. Lett.",
    volume = "126",
    number = "23",
    pages = "232001",
    year = "2021"
}