Measurement of Sequential Υ Suppression in Au+Au Collisions at √s.sub.NN./sub.=200 GeV with the STAR Experiment

0572476 - ÚJF 2024 RIV US eng J - Článek v odborném periodiku
Aboona, B. E. - Adam, J. - Adamczyk, L. - Adams, J. R. - Bielčík, J. - Bielčíková, Jana - Češka, J. - Das, A. - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Lomnický, O. - Prozorova, V. - Robotková, Monika - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. … celkem 359 autorů
Measurement of Sequential Υ Suppression in Au+Au Collisions at √s_NN=200 GeV with the STAR Experiment.
Physical Review Letters. Roč. 130, č. 11 (2023), č. článku 112301. ISSN 0031-9007. E-ISSN 1079-7114
Výzkumná infrastruktura: BNL-CZ III - 90234
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion experiment
Obor OECD: Particles and field physics
Impakt faktor: 8.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevLett.130.112301

We report on measurements of sequential Υ suppression in Au+Au collisions at √sNN=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0%–60% centrality class, the nuclear modification factors (RAA), which quantify the level of yield suppression in heavy-ion collisions compared to p+p collisions, for Υ(1S) and Υ(2S) are 0.40±0.03(stat)±0.03(sys)±0.09(norm) and 0.26±0.08(stat)±0.02(sys)±0.06(norm), respectively, while the upper limit of the Υ(3S) RAA is 0.17 at a 95% confidence level. This provides experimental evidence that the Υ(3S) is significantly more suppressed than the Υ(1S) at RHIC. The level of suppression or Υ(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited Υ states.
Trvalý link: https://hdl.handle.net/11104/0343135