4 research outputs found
The proton-Omega correlation function in Au plus Au collisions at root s(NN)=200 GeV
We present the first measurement of the protonâΩ correlation function in heavy-ion collisions for the central (0â40%) and peripheral (40â80%) AuâŻ+âŻAu collisions at sNN=200 GeV by the STAR experiment at the Relativistic Heavy-Ion Collider (RHIC). Predictions for the ratio of peripheral collisions to central collisions for the protonâΩ correlation function are sensitive to the presence of a nucleonâΩ bound state. These predictions are based on the protonâΩ interaction extracted from (2+1)-flavor lattice QCD calculations at the physical point. The measured ratio of the protonâΩ correlation function between the peripheral (small system) and central (large system) collisions is less than unity for relative momentum smaller than 40 MeV/c. Comparison of our measured correlation ratio with theoretical calculation slightly favors a protonâΩ bound system with a binding energy of ⌠27 MeV. Keywords: Correlations, Femtoscopy, NΩ dibaryo