Diffusion of non-Gaussianity in heavy ion collisions

14th International Conference on Strangeness in Quark Matter

Kitazawa, Masakiyo^1 ; Asakawa, Masayuki^1 ; Ono, Hirosato^1

Department of Physics, Osaka University, Osaka 560-0043 Toyonaka, Japan^1

关键词: Dynamical evolution;    Fourth order cumulant;    Heavy ion collision;    Higher order cumulants;    Master equations;    Non-Gaussian fluctuations;    Parameter range;    Relativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012053/pdf
DOI  :  10.1088/1742-6596/509/1/012053

来源: IOP

【 摘 要 】

We investigate the time evolution of higher order cumulants of bulk fluctuations of conserved charges in the hadronic stage in relativistic heavy ion collisions. The dynamical evolution of non-Gaussian fluctuations is modeled by the diffusion master equation. Using this model we predict that the fourth-order cumulant of net-electric charge is suppressed compared with the recently observed second-order one at ALICE for a reasonable parameter range. Significance of the measurements of various cumulants as functions of rapidity window to probe dynamical history of the hot medium created by heavy ion collisions is emphasized.