Interferometry correlations in central p+Pb collisions

TL;DR

This paper investigates pion interferometry correlations in central p+Pb collisions at 5.02 TeV using a 3+1D viscous hydrodynamic model, revealing weak rapidity dependence and agreement with ATLAS data.

Contribution

It applies a 3+1D viscous hydrodynamic model with Glauber initial conditions to analyze interferometry correlations in p+Pb collisions.

Findings

Interferometry radii show weak rapidity dependence.

A nonzero cross-term between out and long directions is observed.

Model results agree with recent ATLAS measurements.

Abstract

We present results on interferometry correlations for pions emitted in central p+Pb collisions at 5.02TeV in a 3+1 dimensional viscous hydrodynamic model with initial conditions from the Glauber Monte Carlo model. The correlation function is calculated as a function of the pion pair rapidity. The extracted interferometry radii show a weak rapidity dependence, reflecting the lack of boost invariance of the pion distribution. A cross-term between the $out$ and $long$ directions is found to be nonzero. The results obtained in the hydrodynamic model are in fair agreement with recent data of the ATLAS Collaboration.