The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at sqrt(s) = 7 TeV, as a function of transverse momentum pT and absolute rapidity |y|. The analysis uses J/ψ and ψ(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90 fb−1, respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to pT = 120 and 100 GeV for the J/ψ and ψ(2S), respectively, when integrated over the interval |y| < 1.2. The ratio of the ψ(2S) to J/ψ cross sections is also reported for |y| < 1.2, over the range 10 < pT < 100 GeV. These are the highest pT values for which the cross sections and ratio have been measured.

Measurement of J /ψ and ψ (2S) prompt double-differential cross sections in pp collisions at sqrt(s) =7TeV

Sola, V.;AMAPANE, Nicola Carlo;ARGIRO', Stefano;BELLAN, Riccardo;CASASSO, STEFANO;COSTA, Marco;COVARELLI, Roberto;DEGANO, Alessandro;FINCO, LINDA;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PACHER, LUCA;PELLICCIONI, Mario;PINNA ANGIONI, GIAN LUCA;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;TAMPONI, UMBERTO;
2015-01-01

Abstract

The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at sqrt(s) = 7 TeV, as a function of transverse momentum pT and absolute rapidity |y|. The analysis uses J/ψ and ψ(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90 fb−1, respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to pT = 120 and 100 GeV for the J/ψ and ψ(2S), respectively, when integrated over the interval |y| < 1.2. The ratio of the ψ(2S) to J/ψ cross sections is also reported for |y| < 1.2, over the range 10 < pT < 100 GeV. These are the highest pT values for which the cross sections and ratio have been measured.
2015
114
191802
1
16
http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.114.191802/apsxml
Physics and Astronomy (all)
Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hör...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1576544
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