Kinetic Freeze-out Spectra of Identified Particles Produced in p-Pb Collisions at root(sNN) = 5.02 TeV

TL;DR

This paper analyzes the transverse momentum spectra of identified particles in p-Pb collisions at 5.02 TeV using a thermal model, revealing insights into freeze-out properties and collective flow.

Contribution

It applies the Unified Statistical Thermal Freeze-out Model to p-Pb collision data, providing detailed freeze-out parameters and resonance decay effects analysis.

Findings

Good agreement between model and ALICE data

Heavier particles exhibit flatter pT spectra

Extracted kinetic freeze-out temperature and flow velocity

Abstract

We study the transverse momentum spectra of identified pions, Kaons, protons and Lambdas produced at midrapidity (0 < y < 0.5)in most central p-Pb collisions at root(sNN) = 5.02 TeV in comparison with a Unified Statistical Thermal Freeze-out Model (USTFM). The measurements of pions are reported upto pT = 3 GeV, the kaons (K- + K+) are reported upto pT = 2.5 GeV, K0s is reported upto pT = 7 GeV and the baryons (protons and Lambdas) are reported upto pT = 3.5 GeV. A good agreement is seen between the calculated results and the experimental data points taken from the ALICE experiment. The transverse momentum spectra are found to be flatter for heavy particles than for light particles. Bulk freeze-out properties in terms of kinetic freezeout temperature and the transverse collective flow velocity are extracted from the fits of the transverse momentum spectra of these hadrons. The effect of resonance decay contributions has also been taken care of.