Baryon stopping as a relativistic Markov process in phase space

Abstract

We reconsider baryon stopping in relativistic heavy-ion collisions in a nonequilibrium-statistical framework. The approach combines earlier formulations based on quantum chromodynamics with a relativistic diffusion model through a suitably derived fluctuation-dissipation relation, thus allowing for a fully time-dependent theory that is consistent with QCD. We use an existing framework for relativistic stochastic processes in spacetime that are Markovian in phase space, and adapt it to derive a Fokker-Planck equation in rapidity space, which is solved numerically. The time evolution of the net-proton distribution function in rapidity space agrees with stopping data from the CERN Super Proton Synchrotron and the BNL Relativistic Heavy Ion Collider.

9 pages, 4 figures, 1 table

References in corpus (6)

• Relativistic Brownian Motion
• Relativistic diffusion processes and random walk models
• Invariance of the relativistic one-particle distribution function
• Time parameters and Lorentz transformations of relativistic stochastic processes
• Beyond the thermal model in relativistic heavy-ion collisions
• Aspects of relativistic heavy-ion collisions

Cited by in corpus (2)

• Aspects of relativistic heavy-ion collisions
• Cylindrically symmetric diffusion model for relativistic heavy-ion collisions