Measurement of J/ψ and ψ(2S) prompt double-differential cross sections in pp collisions at √s = 7 TeV
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Khachatryan-2015-Measurement of J.pdf
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Author(s)
Apyan, Aram
Barbieri, Richard Alexander
Bierwagen, Katharina
Busza, Wit
Cali, Ivan Amos
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Date Issued
May 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Ero, et al. “Measurement of J/ψ and ψ(2S) Prompt Double-Differential Cross Sections in pp Collisions at √s = 7 TeV.” Physical Review Letters 114, no. 19 (May 2015). © 2015 CERN, for the CMS Collaboration
Version
Final published version
Abstract
The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at √s = 7 TeV, as a function of transverse momentum p[subscript T] 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[superscript −1], respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to p[subscript T] = 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 < p[subscript T] < 100 GeV. These are the highest p[subscript T] values for which the cross sections and ratio have been measured.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.114.191802
