Extracting baryon-antibaryon strong-interaction potentials from p (Λ) over bar femtoscopic correlation functions

The STAR experiment has measured p Lambda, (p) over bar(Lambda) over bar, (p) over bar Lambda, and p(Lambda) over bar femtoscopic correlation functions in central Au + Au collisions at root(NN)-N-S = 200 GeV. The system size extracted for p Lambda and (p) over bar(Lambda) over bar is consistent with model expectations and results for other pair types, while for p(Lambda) over bar and (p) over bar Lambda it is not consistent with the other two and significantly lower. In addition an attemptwasmade to extract the unknown parameters of the strong interaction potential for this baryon- antibaryon (B (B) over bar) pair. In this work we reanalyze the STAR data, taking into account residual femtoscopic correlations from heavier B (B) over bar pairs. We obtain different estimates for the system size, consistent with the results for p Lambda and (p) over bar(Lambda) over bar pairs and with model expectations. We give these estimates for the strong interaction potential parameters for p(Lambda) over bar and show that similar constraints can be given for parameters for other, heavier B (B) over bar pairs.