Baryon femtoscopy considering residual correlations as a tool to extract strong interaction potentials

Warsaw University of Technology, Faculty of Physics

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

Published online: 29 May 2015

Abstract

In this article, the analysis of baryon-antibaryon femtoscopic correlations is presented. In particular, it is shown that taking into account residual correlations is crucial for the description of p$$\overline{\Lambda }$$ and p̄Λ correlation functions measured by the STAR experiment in Au–Au collisions at the centre-of-mass energy per nucleon pair √s_NN = 200 GeV. This approach enables to obtain p$$\overline{\Lambda }$$ (p̄Λ) source size consistent with the sizes extracted from correlations in pΛ (p̄$$\overline{\Lambda }$$) and lighter pair systems as well as with model predictions. Moreover, with this analysis it is possible to derive the unknown parameters of the strong interaction potential for baryon-antibaryon pairs under several assumptions.