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Journal Article

The Proton-Ω correlation function in Au+Au collisions at sqrt{s_NN} = 200 GeV

MPS-Authors

STAR Collaboration, 
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Adam,  J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmitz,  N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Seyboth,  P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

et al., 
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

STAR Collaboration, Adam, J., Schmitz, N., Seyboth, P., & et al. (2019). The Proton-Ω correlation function in Au+Au collisions at sqrt{s_NN} = 200 GeV. Physics Letters B, 790, 490-497. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-278.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D675-6
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 \sqrtsNN\,\,=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 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. Comparison of our measured correlation ratio with the theoretical calculation slightly favors a proton-\Omega bound system with a binding energy of \sim 27~MeV.