Observation of the Ï(3S) Meson and Suppression of Ï States in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV.
Phys Rev Lett
; 133(2): 022302, 2024 Jul 12.
Article
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| MEDLINE
| ID: mdl-39073941
ABSTRACT
The production of Ï(2S) and Ï(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 Ï(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 Ï(2S) and Ï(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 Ï yields in Pb-Pb collisions. This suppression increases from peripheral to central Pb-Pb collisions. Furthermore, the suppression is stronger for Ï(3S) mesons compared to Ï(2S) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the J/ψ, ψ(2S), Ï(1S), and Ï(2S) mesons.
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2024
Tipo del documento:
Article
País de afiliación:
Armenia