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.

14 pages, 6 figures, 3 new references and added text, as accepted for Phys. Rev. C

References in corpus (14)

• Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies
• CGC predictions for p+Pb collisions at the LHC
• Single Inclusive Hadron Production at RHIC and the LHC from the Color Glass Condensate
• Particle Production at High Energy and Large Transverse Momentum - "The Hybrid Formalism" Revisited
• Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling
• CGC predictions for p+A collisions at the LHC and signature of QCD saturation
• Particle production sources at LHC energies
• Ultraviolet energy dependence of particle production sources in relativistic heavy-ion collisions
• System-size dependence of the charged-particle pseudorapidity density at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV for pp, p-Pb, and Pb-Pb collisions
• Baryon stopping as a relativistic Markov process in phase space
• Testing the running coupling $k_T$-factorization formula for the inclusive gluon production
• Analysis of pPb collisions at LHC energies in the relativistic diffusion model
• Limiting fragmentation in heavy-ion stopping?
• Cylindrically symmetric diffusion model for relativistic heavy-ion collisions

Cited by in corpus (1)

• Predictions for charged-hadron production in $p$-O collisions at LHC energies