Blast-wave model description of the Hanbury-Brown--Twiss radii in pp collisions at LHC energies

TL;DR

This paper applies the blast wave model to analyze Hanbury-Brown--Twiss radii in proton-proton collisions at LHC energies, providing insights into the system's size, lifetime, and freeze-out conditions.

Contribution

It introduces a detailed blast wave model analysis of HBT radii in pp collisions, highlighting specific freeze-out temperature and emission profile parameters.

Findings

Good data description at T ~ 100 MeV

Emission from a shell with width ~1.5 fm fits data

System size and lifetime vary with multiplicity

Abstract

The blast wave model is applied to the recent data on HBT radii in pp collisions, measured by the ALICE collaboration. A reasonable description of data is obtained for a rather low temperature of the kinetic freeze-out, T ~ 100 MeV, and the transverse profile corresponding to the emission from a shell of a fairly small width 2 d ~ 1.5 fm. The size and the life-time of the produced system are determined for various multiplicities of the produced particles.