Lattice QCD results on cumulant ratios at freeze-out

Karsch F (2017)
In: Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016). Huang HZ, Seto RK, Thaeder JM, Xu N (Eds); Journal of Physics: Conference Series, 779. IOP Publishing.

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Editor
Huang, Huan Zhong ; Seto, Richard K. ; Thaeder, Jochen Mathias ; Xu, Nu
Abstract
Ratios of cumulants of net proton-number fluctuations measured by the STAR Collaboration show strong deviations from a skellam distribution, which should describe thermal properties of cumulant ratios, if proton-number fluctuations are generated in equilibrium and a hadron resonance gas (HRG) model would provide a suitable description of thermodynamics at the freeze-out temperature. We present some results on sixth order cumulants entering the calculation of the QCD equation of state at non-zero values of the baryon chemical potential (mu_B) and discuss limitations on the applicability of HRG thermodynamics deduced from a comparison between QCD and HRG model calculations of cumulants of conserved charge fluctuations. We show that basic features of the μB-dependence of skewness and kurtosis ratios of net proton-number fluctuations measured by the STAR Collaboration resemble those expected from a O(mu_B^2) QCD calculation of the corresponding net baryon-number cumulant ratios.
Publishing Year
Conference
16th International Conference on Strangeness in Quark Matter (SQM 2016)
Location
Berkeley, CA
Conference Date
2016-06-16 – 2016-07-01
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Karsch F. Lattice QCD results on cumulant ratios at freeze-out. In: Huang HZ, Seto RK, Thaeder JM, Xu N, eds. Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016). Journal of Physics: Conference Series. Vol 779. IOP Publishing; 2017.
Karsch, F. (2017). Lattice QCD results on cumulant ratios at freeze-out. In H. Z. Huang, R. K. Seto, J. M. Thaeder, & N. Xu (Eds.), Journal of Physics: Conference Series: Vol. 779. Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016) IOP Publishing. doi:10.1088/1742-6596/779/1/012015
Karsch, F. (2017). “Lattice QCD results on cumulant ratios at freeze-out” in Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016), Huang, H. Z., Seto, R. K., Thaeder, J. M., and Xu, N. eds. Journal of Physics: Conference Series, vol. 779, (IOP Publishing).
Karsch, F., 2017. Lattice QCD results on cumulant ratios at freeze-out. In H. Z. Huang, et al., eds. Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016). Journal of Physics: Conference Series. no.779 IOP Publishing.
F. Karsch, “Lattice QCD results on cumulant ratios at freeze-out”, Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016), H.Z. Huang, et al., eds., Journal of Physics: Conference Series, vol. 779, IOP Publishing, 2017.
Karsch, F.: Lattice QCD results on cumulant ratios at freeze-out. In: Huang, H.Z., Seto, R.K., Thaeder, J.M., and Xu, N. (eds.) Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016). Journal of Physics: Conference Series. 779, IOP Publishing (2017).
Karsch, Frithjof. “Lattice QCD results on cumulant ratios at freeze-out”. Proceedings, 16th International Conference on Strangeness in Quark Matter (SQM 2016). Ed. Huan Zhong Huang, Richard K. Seto, Jochen Mathias Thaeder, and Nu Xu. IOP Publishing, 2017.Vol. 779. Journal of Physics: Conference Series.
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