Baryon femtoscopy in sqrt(sNN) = 2.76 TeV Pb-Pb collisions at ALICE

TL;DR

This paper reports femtoscopic measurements of proton and Lambda correlations in high-energy Pb-Pb collisions, revealing transverse mass scaling and insights into final state interactions affecting proton yields.

Contribution

It provides the first femtoscopic analysis of baryon correlations at LHC energies, highlighting transverse mass scaling and baryon-antibaryon interaction effects.

Findings

Femtoscopic radii show approximate transverse mass scaling.

Baryon-antibaryon correlations suggest inelastic final state interactions.

Results support radial flow and baryon-antibaryon interaction models.

Abstract

We present femtoscopic results for proton and Lambda correlation functions measured by ALICE in sqrt(sNN) = 2.76 TeV Pb-Pb collisions. Femtoscopic radii are extracted from pp, pbarpbar, and ppbar pairs. Comparisons of these radii with those from pion and kaon analyses reveal an approximate transverse mass scaling that is consistent with explanations of radial flow. Inelastic final state interactions are explored in baryon-antibaryon correlations functions to investigate their relationship with reduced proton yields at LHC energies.