Relativistic diffusion model for hadron production in p-Pb collisions at the LHC
Abstract
We investigate charged-hadron production in relativistic heavy-ion collisions of asymmetric systems within a nonequilibrium-statistical framework. Calculated centrality-dependent pseudorapidity distributions for p-Pb collisions at sqrt(s_NN)=5.02 and 8.16 TeV are compared with data from the Large Hadron Collider (LHC). Our approach combines a relativistic diffusion model with formulations based on quantum chromodynamics while utilizing numerical solutions of a Fokker-Planck equation to account for the shift and broadening of the fragmentation sources for particle-production with respect to the stopping (net-baryon) rapidity distributions. To represent the centrality dependence of charged-hadron production in asymmetric systems over a broad region of pseudorapidities, the consideration and precise modelling of the fragmentation sources - along with the central gluon-gluon source - is found to be essential. Specifically, this results in an inversion of the particle-production amplitude from backward- to forward-dominance when transitioning from central to peripheral collisions, in agreement with recent ATLAS and ALICE p-Pb data at sqrt(s_NN)=5.02 TeV.
Cite
@article{arxiv.2409.17960,
title = {Relativistic diffusion model for hadron production in p-Pb collisions at the LHC},
author = {Philipp Schulz and Georg Wolschin},
journal= {arXiv preprint arXiv:2409.17960},
year = {2024}
}
Comments
14 pages, 6 figures, 3 new references and added text, as accepted for Phys. Rev. C