TY - JOUR
T1 - Observation of the ϒ(3S) Meson and Suppression of ϒ States in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV
AU - Tumasyan, A.
AU - Adam, W.
AU - Andrejkovic, J. W.
AU - Bergauer, T.
AU - Chatterjee, S.
AU - Damanakis, K.
AU - Dragicevic, M.
AU - Escalante Del Valle, A.
AU - Hussain, P. S.
AU - Thakur, S.
AU - CMS Collaboration
N1 - Publisher Copyright:
© 2024 CERN, for the CMS Collaboration.
PY - 2024/7/12
Y1 - 2024/7/12
N2 - The production of ϒ(2S) and ϒ(3S) mesons in lead-lead (Pb-Pb) and proton-proton (pp) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ϒ(3S) meson is observed for the first time in Pb-Pb collisions, with a significance above 5 standard deviations. The ratios of yields measured in Pb-Pb and pp collisions are reported for both the ϒ(2S) and ϒ(3S) mesons, as functions of transverse momentum and Pb-Pb collision centrality. These ratios, when appropriately scaled, are significantly less than unity, indicating a suppression of ϒ yields in Pb-Pb collisions. This suppression increases from peripheral to central Pb-Pb collisions. Furthermore, the suppression is stronger for ϒ(3S) mesons compared to ϒ(2S) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the J/ψ, ψ(2S), ϒ(1S), and ϒ(2S) mesons.
AB - The production of ϒ(2S) and ϒ(3S) mesons in lead-lead (Pb-Pb) and proton-proton (pp) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ϒ(3S) meson is observed for the first time in Pb-Pb collisions, with a significance above 5 standard deviations. The ratios of yields measured in Pb-Pb and pp collisions are reported for both the ϒ(2S) and ϒ(3S) mesons, as functions of transverse momentum and Pb-Pb collision centrality. These ratios, when appropriately scaled, are significantly less than unity, indicating a suppression of ϒ yields in Pb-Pb collisions. This suppression increases from peripheral to central Pb-Pb collisions. Furthermore, the suppression is stronger for ϒ(3S) mesons compared to ϒ(2S) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the J/ψ, ψ(2S), ϒ(1S), and ϒ(2S) mesons.
UR - https://www.scopus.com/pages/publications/85199540386
U2 - 10.1103/PhysRevLett.133.022302
DO - 10.1103/PhysRevLett.133.022302
M3 - Article
C2 - 39073941
AN - SCOPUS:85199540386
SN - 0031-9007
VL - 133
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 022302
ER -