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Multiplicity dependence of σψ(2S)/σJ/ψ in pp collisions at √s = 13 TeV

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The ratio of production cross-sections of ψ(2S) over J/ψ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy √s = 13 TeV is measured with a data sample collected by the LHCb detector, corresponding to an integrated luminosity of 658 pb−1. The...

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Hauptverfasser: Aaij, Roel (Verfasst von) , Bachmann, Sebastian (Verfasst von) , Carus, Leon (Verfasst von) , Cocha Toapaxi, Carlos (Verfasst von) , De Cian, Michel (Verfasst von) , Glaser, Fabian (Verfasst von) , Günther, Paul André (Verfasst von) , Han, Xiaoxue (Verfasst von) , Hansmann-Menzemer, Stephanie (Verfasst von) , Herrero Gascón, Paula (Verfasst von) , Langenbruch, Christoph (Verfasst von) , Leverington, Blake (Verfasst von) , Marks, Jörg (Verfasst von) , Morgenthaler, Maurice Pierre (Verfasst von) , Roy, Shreya (Verfasst von) , Ruiz Diaz, Miguel (Verfasst von) , Tuci, Giulia (Verfasst von) , Uecker, Lennart Henning (Verfasst von) , Unverzagt, Daniel Joachim (Verfasst von) , Uwer, Ulrich (Verfasst von) , Wang, Chishuai (Verfasst von) , Witola, Lukas (Verfasst von) , Zhao, Ya (Verfasst von) , Zhelezov, Alexey (Verfasst von)
Körperschaft: LHCb Collaboration (Verfasst von)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: May 22, 2024
In: Journal of high energy physics
Year: 2024, Heft: 5, Pages: 243-1-243-34
ISSN:1029-8479
DOI:10.1007/JHEP05(2024)243
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP05(2024)243
Volltext
Verfasserangaben:the LHCb collaboration
Beschreibung
Zusammenfassung:The ratio of production cross-sections of ψ(2S) over J/ψ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy √s = 13 TeV is measured with a data sample collected by the LHCb detector, corresponding to an integrated luminosity of 658 pb−1. The ratio is measured for both prompt and non-prompt ψ(2S) and J/ψ mesons. When there is an overlap between the rapidity ranges over which multiplicity and charmonia production are measured, a multiplicity-dependent modification of the ratio is observed for prompt mesons. No significant multiplicity dependence is found when the ranges do not overlap. For non-prompt production, the ψ(2S)-to-J/ψ production ratio is roughly independent of multiplicity, irrespective of the rapidity range over which the multiplicity is measured. The results are compared to predictions of the co-mover model and agree well except in the low multiplicity region. The ratio of production cross-sections of ψ(2S) over J/ψ mesons are cross-checked with other measurements in di-lepton channels and found to be compatible.
Beschreibung:Gesehen am 08.01.2026
The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, C. Cocha Toapaxi, M. De Cian, F. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S.R. Roy, M. Ruiz Diaz, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und zahlreiche weitere]
Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP05(2024)243

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