Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au plus Au Collisions at root s(NN)=27, 54.4, and 200 GeV at RHIC

0551857 - ÚJF 2022 RIV US eng J - Journal Article
Abdallah, M. S. - Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Ponimatkin, Georgij - Prozorova, V. - Robotková, Monika - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … Total 392 authors
Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au plus Au Collisions at root s(NN)=27, 54.4, and 200 GeV at RHIC.
Physical Review Letters. Roč. 127, č. 26 (2021), č. článku 262301. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT LTT18002
Research Infrastructure: BNL-CZ II - 90109
Institutional support: RVO:61389005
Keywords : STAR collaboration * heavy ion collisions
OECD category: Particles and field physics
Impact factor: 9.185, year: 2021
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevLett.127.262301

According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region mu(B) <= T-c. In this range the ratio, C-6/C-2, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C-6/C-2 from 27, 54.4, and 200 GeV Au + Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (p(T) , y) are analyzed. While for 27 and 54.4 GeV collisions the C-6/C-2 values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C-6/C-2 ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
Permanent Link: http://hdl.handle.net/11104/0327059