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Observation of the ϒ(3S) Meson and Suppression of ϒ States in Pb-Pb Collisions at √$^{S}$NN = 5.02 TeV

CMS Collaboration; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Escalante Del Valle, A.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Mikulec, I.; Paulitsch, P.; Pitters, F. M.; Schieck, J.; Schöfbeck, R.; ... mehr

Abstract:

The production of ϒ⁡(2⁢𝑆) and ϒ⁡(3⁢𝑆) mesons in lead-lead (Pb-Pb) and proton-proton (𝑝⁢𝑝) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ϒ⁡(3⁢𝑆) 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 𝑝⁢𝑝 collisions are reported for both the ϒ⁡(2⁢𝑆) and ϒ⁡(3⁢𝑆) 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⁡(3⁢𝑆) mesons compared to ϒ⁡(2⁢𝑆) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the 𝐽/𝜓, 𝜓⁡(2⁢𝑆), ϒ⁡(1⁢𝑆), and ϒ⁡(2⁢𝑆) mesons.


Verlagsausgabe §
DOI: 10.5445/IR/1000173107
Veröffentlicht am 05.08.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2024
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000173107
HGF-Programm 51.11.01 (POF IV, LK 01) Teilchenphysik
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 133
Heft 2
Seiten Art.-Nr.: 022302
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 12.07.2024
Nachgewiesen in Scopus
arXiv
Web of Science
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