Lambda-Lambda Correlation in Relativistic Heavy Ion Collisions
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We investigate Λ − Λ correlation function in relativistic heavy ion collisions to extract their interaction. Using an expanding source model for heavy ion collisions, we disentangle effects of collective expansion and those of the interaction at low relative momenta. Then, we discuss the influence of the feed-down correction for Σ⁰ decay and indicate the possible existence of a residual correlation at high relative momenta. Consequently, the present STAR data suggest a weakly attractive interaction for the ΛΛ pairs which is represented by the scattering length, 1/a₀ < −0.8 fm⁻¹.
Resonance Workshop at Catania, Catania, Italy, November 3-7, 2014
- EPJ Web of Conferences
EPJ Web of Conferences (97), 2015-06