Measurement of ψ(2S) nuclear modification at backward and forward rapidity in p+p, p+Al, and p+Au collisions at √s.sub.NN./sub.=200 GeV

0566525 - FZÚ 2023 RIV US eng J - Journal Article
Acharya, U.A. - Aidala, C. - Akiba, Y. - Vrba, Václav … Total 313 authors
Measurement of ψ(2S) nuclear modification at backward and forward rapidity in p+p, p+Al, and p+Au collisions at √s_NN=200 GeV.
Physical Review C. Roč. 105, č. 6 (2022), č. článku 064912. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:68378271
Keywords : suppression * shadowing * J/ψ(3100) * CERN LHC Coll
OECD category: Particles and field physics
Impact factor: 3.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.105.064912

Suppression of the J/ψ nuclear-modification factor has been seen as a trademark signature of final-state effects in large collision systems for decades. In small systems, the nuclear modification was attributed to cold-nuclear-matter effects until the observation of strong differential suppression of the ψ(2S) state in p+A and d+A collisions suggested the presence of final-state effects. Results of J/ψ and ψ(2S) measurements in the dimuon decay channel are presented here for p+p, p+Al, and p+Au collision systems at sNN=200GeV. The results are predominantly shown in the form of the nuclear-modification factor, RpA, the ratio of the ψ(2S) invariant yield per nucleon-nucleon collision in collisions of proton on target nucleus to that in p+p collisions. Measurements of the J/ψ and ψ(2S) nuclear-modification factor are compared with shadowing and transport-model predictions, as well as to complementary measurements at Large Hadron Collider energies.
Permanent Link: https://hdl.handle.net/11104/0337856