The Proton-$\Omega$ correlation function in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV
Phys.Lett.B 790 (2019) 490-497, 2019.
The STAR collaboration

Abstract (data abstract)
'We present the first measurement of the proton-$\Omega$ correlation function in heavy-ion collisions for central (0-40$\%$) and peripheral (40-80$\%$) Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV by the STAR experiment at the Relativistics Heavy-Ion Collider (RHIC). Predictions for the ratio of peripheral collisions to central collisons for the proton-$\Omega$ correlation function are sensitive to the presence of a nucleon-$\Omega$ bound state. These predictions are based on the proton-$\Omega$ interaction extracted from (2+1)-flavor lattice QCD calculations at the physical point. The measured ratio of proton-$\Omega$ correlation function from peripheral (small system) to central (large system) collisions is less than unity for relative momentum smaller than 40 MeV/c. Comparision of our measured correlation ratio with the theoretical calculation slightly favors a proton-$\Omega$ bound system with a binding energy of 27 MeV.'

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