Upsilon production in U plus U collisions at root s(NN)=193 GeV measured with the STAR experiment

0471135 - ÚJF 2017 RIV US eng J - Journal Article
Adamczyk, L. - Bielčík, J. - Bielčíková, Jana - Chaloupka, P. - Federič, Pavol - Rusňák, Jan - Rusňáková, O. - Šimko, Miroslav - Šumbera, Michal - Vértési, Robert … Total 345 authors
Upsilon production in U plus U collisions at root s(NN)=193 GeV measured with the STAR experiment.
Physical Review C. Roč. 94, č. 6 (2016), č. článku 064904. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA ČR GA13-20841S
Institutional support: RVO:61389005
Keywords : STAR collaboration * heavy ion collisions * Upsilon
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.820, year: 2016

We present a measurement of the inclusive production of. mesons in U + U collisions at root s(NN) = 193 GeV at midrapidity (vertical bar y vertical bar < 1). Previous studies in central Au+Au collisions at root s(NN) = 200 GeV show a suppression of Upsilon (1S+2S+3S) production relative to expectations from the Upsilon yield in p+p collisions scaled by the number of binary nucleon-nucleon collisions (N-coll), with an indication that the.(1S) state is also suppressed. The present measurement extends the number of participant nucleons in the collision (N-part) by 20% compared to Au+Au collisions, and allows us to study a system with higher energy density. We observe a suppression in both the Upsilon (1S+2S+3S) and Upsilon (1S) yields in central U+U data, which consolidates and extends the previously observed suppression trend in Au+Au collisions.
Permanent Link: http://hdl.handle.net/11104/0268583