Lévy HBT Results at NA61/SHINE

摘要

Bose–Einstein (or Hanbury–Brown and Twiss (HBT)) momentum correlations reveal the space–time structure of the particle emitting source created in high energy nucleus–nucleus collisions. In this paper we present the latest NA61/SHINE measurements of Bose–Einstein correlations of identified pion pairs and their description based on Lévy distributed sources in Be + Be collisions at 150 A GeV/ c . We investigate the transverse mass dependence of the Lévy source parameters and discuss their possible interpretations.