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Central exclusive production of J/[psi] and [psi](2S) mesons in pp collisions at √s=13 TeV

Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of...

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Hauptverfasser: Aaij, Roel (VerfasserIn) , D'Argent, Philippe (VerfasserIn) , Bachmann, Sebastian (VerfasserIn) , Braun, Svende (VerfasserIn) , De Cian, Michel (VerfasserIn) , Comerma-Montells, Albert (VerfasserIn) , Dordei, Francesca (VerfasserIn) , Esen, Sevda (VerfasserIn) , Färber, Christian (VerfasserIn) , Gerick, David (VerfasserIn) , Han, Xiaoxue (VerfasserIn) , Hansmann-Menzemer, Stephanie (VerfasserIn) , Kecke, Matthieu (VerfasserIn) , Khanji, Basem (VerfasserIn) , Krokovny, Pavel (VerfasserIn) , Leverington, Blake (VerfasserIn) , Marks, Jörg (VerfasserIn) , Mitzel, Dominik (VerfasserIn) , Neubert, Sebastian (VerfasserIn) , Neuner, Max (VerfasserIn) , Piucci, Alessio (VerfasserIn) , Seyfert, Paul (VerfasserIn) , Stemmle, Simon (VerfasserIn) , Tilburg, Jeroen van (VerfasserIn) , Uwer, Ulrich (VerfasserIn) , Zhelezov, Alexey (VerfasserIn) , Stahl, Marian (VerfasserIn)
Körperschaft: LHCb Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: October 26, 2018
In: Journal of high energy physics
Year: 2018, Heft: 10
ISSN:1029-8479
DOI:10.1007/JHEP10(2018)167
Online-Zugang:Verlag, Volltext: https://doi.org/10.1007/JHEP10(2018)167
Verlag, Volltext: https://link.springer.com/content/pdf/10.1007%2FJHEP10%282018%29167.pdf
Volltext
Verfasserangaben:the LHCb Collaboration
Beschreibung
Zusammenfassung:Measurements are reported of the central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters. The products of the cross-sections and the branching fractions for the decays to dimuons, where both muons are within the pseudorapidity range 2.0 < η < 4.5, are measured to be σJ/ψ→μ+μ−=435±18±11±17 pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4 pb.σJ/ψ→μ+μ−=435±18±11±17 pbσψ(2S)→μ+μ−=11.1±1.1±0.3±0.4 pb. \begin{array}{c}\hfill {\sigma}_{J/\psi \to {\mu}^{+}{\mu}^{-}} = 435 \pm 18 \pm 11 \pm 17\ \mathrm{p}\mathrm{b}\hfill \\ {}\hfill {\sigma}_{\psi (2S)\to {\mu}^{+}{\mu}^{-}} = 11.1 \pm 1.1 \pm 0.3 \pm 0.4\ \mathrm{p}\mathrm{b}.\hfill \end{array} The first uncertainties are statistical, the second are systematic, and the third are due to the luminosity determination. The cross-sections are also measured differentially for meson rapidities between 2.0 and 4.5. Good agreement is observed with theoretical predictions. Photoproduction cross-sections are derived and compared to previous experiments, and a deviation from a pure power-law extrapolation of lower energy data is observed. Open image in new window
Beschreibung:Im Titel wird "psi" als griechischer Buchstabe dargestellt
The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, F. Dordei, S. Esen, C. Färber, D. Gerick, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, P. Krokovny, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, P. Seyfert, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere]
Gesehen am 04.06..2019
Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP10(2018)167

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