Baryon femtoscopy in heavy-ion collisions at ALICE

Faculty of Physics, Warsaw University of Technology, Koszykowa 75 00-662 Warsaw, Poland

^a e-mail: maszyman@if.pw.edu.pl

Published online: 29 April 2014

Abstract

In this report, femtoscopic measurements with pp, $\overline{\text{p}}\overline{\text{p}}$, $\text{p}\overline{\text{p}}$, $\text{p}\overline{\text{Λ}}$, $\overline{\text{p}}\text{Λ}$ and $\text{Λ}\overline{\text{Λ}}$ pairs in Pb–Pb collisions at √s_NN = 2:76 TeV registered by ALICE at the LHC are presented. Emission source sizes extracted from the correlation analysis with (anti)protons grow with the event multiplicity, as expected. A method to extract the interaction potentials (e.g. for $\text{p}\overline{\text{Λ}}$ and $\overline{\text{p}}\text{Λ}$ pairs) based on femtoscopy analysis is discussed. The importance of taking into account the so-called residual correlations induced by pairs contaminated by secondary particles is emphasized for all analyses mentioned above.