The proton-Omega correlation function in Au plus Au collisions at root s(NN)=200 GeV

0503631 - ÚJF 2020 RIV NL eng J - Journal Article
Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Chaloupka, P. - Federič, Pavol - Federičová, P. - Harlenderová, A. - Holub, L. - Kramárik, L. - Kvapil, J. - Lidrych, J. - Matonoha, O. - Rusňák, Jan - Rusňáková, O. - Šimko, Miroslav - Šumbera, Michal - Vaněk, Jan … Total 343 authors
The proton-Omega correlation function in Au plus Au collisions at root s(NN)=200 GeV.
Physics Letters. B. Roč. 790, č. 3 (2019), s. 490-497. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LTT18002
Institutional support: RVO:61389005
Keywords : STAR experiment * correlations * femtoscopy * N Omega dibaryon
OECD category: Nuclear physics
Impact factor: 4.384, year: 2019
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2019.01.055

We present the first measurement of the proton-Omega correlation function in heavy-ion collisions for the central (0-40%) and peripheral (40-80%) Au + Au collisions at root s(NN) = 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 the proton-Omega 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 proton-Omega bound system with a binding energy of similar to 27 MeV.
Permanent Link: http://hdl.handle.net/11104/0295437