Rapidity Correlation Structures from Causal Hydrodynamics

32nd Winter Workshop on Nuclear Dynamics

Gavin, Sean^1 ; Moschelli, George^2 ; Zin, Christopher^1

Department of Physics and Astronomy, Wayne State University, Detroit

MI

48202, United States^1

Lawrence Technological University, 21000 West Ten Mile Road, Southfield

MI

48075, United States^2

关键词: Additional structures;    Correlation structure;    Rapidity distribution;    Second orders;    Stochastic noise;    Transverse momenta;    Two particles;    Viscous diffusion;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/736/1/012020/pdf
DOI  :  10.1088/1742-6596/736/1/012020

来源: IOP

【 摘 要 】

Viscous diffusion can broaden the rapidity dependence of two-particle transverse momentum fluctuations. Surprisingly, measurements at RHIC by the STAR collaboration demonstrate that this broadening is accompanied by the appearance of unanticipated structure in the rapidity distribution of these fluctuations in the most central collisions. Although a first order classical Navier-Stokes theory can roughly explain the rapidity broadening, it cannot explain the additional structure. We propose that the rapidity structure can be explained using the second order causal Israel-Stewart hydrodynamics with stochastic noise.