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arxiv: 1805.04445 · v1 · pith:HB6BV3GNnew · submitted 2018-05-11 · ✦ hep-lat

Higher order fluctuations and correlations of conserved charges from lattice QCD

Szabolcs Borsanyi , Zoltan Fodor , Jana N. Guenther , Sandor K Katz , Kalman K. Szabo , Attila Pasztor , Israel Portillo , Claudia Ratti This is my paper
classification ✦ hep-lat
keywords fluctuationsorderchargeschemicalconservedcorrelationshigherlattice
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We calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size $48^3\times12$. Higher order fluctuations at $\mu_B=0$ 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 behavior of the measured cumulant ratios by the STAR collaboration.

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