A new two-component model for hadron production in heavy-ion collisions

Abstract

Using the experimental data from the ALICE program on the centrality dependence of the transverse momentum ($p_T$) spectra in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV, we show that the double-Tsallis distribution and the generalized Fokker-Plank (FP) solution can not describe the spectra of pions, kaons and protons from central to peripheral collisions in the entire $p_T$ region, simultaneously. Hence, a new two-component distribution, which is a hydrodynamic extension of the generalized FP solution accounting for the collective motion effect in heavy-ion collisions, is proposed in order to reproduce all the particle spectra. Our results suggest that the particle production dynamics may be different for different particles, especially at very low $p_T$ region.

7 pages, 5 figures

References in corpus (3)

• Systematic Analysis of the Non-extensive Statistical Approach in High Energy Particle Collisions - Experiment vs. Theory
• System size dependence of the log-periodic oscillations of transverse momentum spectra
• Hydrodynamic extension of the two component model for hadroproduction in heavy-ion collisions

Cited by in corpus (5)

• Mass hierarchy and energy scaling of the Tsallis--Pareto parameters in hadron productions at RHIC and LHC energies
• Momentum distribution and correlation for a free scalar field in the Tsallis nonextensive statistics based on density operator
• Systematic investigation of the particle spectra in Heavy-ion collisions at the Large Hadron Collider
• A three component model for hadron $p_{\mathrm{T}}$-spectra in pp and Pb-Pb collisions at the LHC
• Chiral phase transition within the linear sigma model in the Tsallis nonextensive statistics based on density operator