Observation of the ϒ(3S) Meson and Suppression of ϒ States in Pb-Pb Collisions at √sNN = 5.02 TeV
Open access
Datum
2024-07-12Typ
- Journal Article
ETH Bibliographie
yes
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Abstract
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. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000686638Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Physical Review LettersBand
Seiten / Artikelnummer
Verlag
American Physical SocietyThema
Relativistic heavy-ion collisions; Bottom quark; Quarkonia; Hadron collidersETH Bibliographie
yes
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