Indication of Collective Flow and Transparency in p-p Collisions at LHC

TL;DR

This study analyzes p-p collisions at LHC energies using a thermal model, revealing collective flow, thermal equilibrium, and transparency effects, with results aligning well with experimental data.

Contribution

It introduces a unified thermal freeze-out model that accounts for collective flow, transparency, and resonance contributions in p-p collisions at LHC energies.

Findings

Evidence of significant collective flow in p-p collisions.

Indication of thermal equilibrium in the system.

Successful reproduction of transverse momentum and rapidity distributions.

Abstract

The mid-rapidity transverse momentum spectra of hadrons and the available rapidity distributions of the strange hadrons produced in p-p collisions at LHC energy root(snn) = 0.9 TeV and root(snn)= 7.0 TeV have been studied using a unified statistical thermal freeze-out model. The calculated results are found to be in good agreement with the experimental data. The theoretical fits of the transverse momentum spectra using the model calculations provide the thermal freeze-out conditions in terms of the temperature and collective flow parameters for different hadronic species. The study reveal the presence of significant collective flow and a well defined temperature in the system thus indicating the formation of a thermally equilibrated hydrodynamic system in p-p collisions at LHC. Moreover, the fits to the available experimental rapidity distributions data of strange hadrons show the effect of almost complete transparency in p-p collisions at LHC. The transverse momentum distributions of protons and Kaons produced in p-p collisions at root(snn) = 200 GeV and root(snn)= 2.76 TeV have also been reproduced successfully. The model incorporates longitudinal as well as a transverse hydrodynamic flow. The contributions from heavier decay resonances have also been taken into account. We have also imposed the criteria of exact strangeness conservation in the system.