Erschienen in:Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Publication Series of the John von Neumann Institute for Computing (NIC) NIC Series 50, 207 - 216 (2020). ; NIC Symposium 2020 ; NIC Symposium 2020 NIC Symposium 2020, Jülich, Germany, 2020-02-27 - 2020-02-28
Sprache:
Englisch
Entstehung:
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Beschreibung:
We calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavours with physical masses, on a lattice with size $48^3$ x 12. Higher order fluctuationsat $\mu$ B = 0 are obtained as derivatives of the lower order ones, simulated at imaginary chemical potential. From these correlations and fluctuations we construct ratios of net-baryon number cumulants as functions of temperature and chemical potential, which satisfy the experimental conditions of strangeness neutrality and proton/baryon ratio. Our results qualitatively explain the behaviour of the measured cumulant ratios by the STAR collaboration.