Most lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials. The ill-posedness of numerical analytic continuation puts severe limitations on the reliability of such methods. We studied the QCD chiral transition at finite real baryon density with the more direct sign reweighting approach. We simulate up to a baryochemical potential-temperature ratio of $\mu_B/T=2.7$, covering the RHIC Beam Energy Scan range, and penetrating the region where methods based on analytic continuation are unpredictive. This opens up a new window to study QCD matter at finite $\mu_B$ from first principles.
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- 1 Attila Pasztor,
- 2 Szabolcs Borsanyi,
- 1 2 3 4 5 Zoltan Fodor,
- 1 Matteo Giordano,
- 1 Sándor Katz,
- 1 Daniel Nogradi,
- 2 Chik Him Wong
- 1 Eötvös Loránd Tudományegyetem / Eötvös Loránd University [ELTE]
- 2 Bergische Universität Wuppertal / University of Wuppertal [BUW]
- 3 Forschungszentrum Jülich [FZ Jülich]
- 4 University of California, San Diego [UCSD]
- 5 Pennsylvania State University [PSU]