PUB - Publikationen an der Universität Bielefeld

We present lattice QCD calculations of higher order cumulants of electric charge distributions for small baryon chemical potentials μB\mu_BμB​ by using up to NNNLO Taylor expansions. Ratios of these cumulants are evaluated on the pseudo-critical line, Tpc(μB)T_{pc}(\mu_B)Tpc​(μB​), of the chiral transition and compared to corresponding measurements in heavy ion collision experiments by the STAR and PHENIX Collaborations. We demonstrate that these comparisons give strong constraints on freeze-out parameters. Furthermore, we use strangeness fluctuation observables to compute the ratio μS/μB\mu_S/\mu_BμS​/μB​ on the crossover line and compare it to μS/μB\mu_S/\mu_BμS​/μB​ at freeze-out stemming from fits to strange baryon yields measured by the STAR Collaboration.