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Title: Measurement of prompt J/? pair production in pp collisions at s = 7 Tev
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Meson pairs
Proton-proton collision
CMS experiment
Issue Date: Sep-2014
Publisher: Springer Verlag
Source: Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., ...CMS Collaboration (2014). Measurement of prompt J/ψ pair production in pp collisions at s = 7 Tev. Journal of High Energy Physics, 2014(9). doi:10.1007/JHEP09(2014)094
Abstract: Production of prompt J/ψ meson pairs in proton-proton collisions at s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb-1. The two J/ψ mesons are fully reconstructed via their decays into μ +μ -pairs. This observation provides for the first time access to the high-transverse-momentum region of J/ψ pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/ψ transverse momentum (p T J/ψ) and rapidity (|y J/ψ|): |y J/ψ| < 1.2 for p T J/ψ> 6.5 GeV/c; 1.2 < |y J/ψ| < 1.43 for a p Tthreshold that scales linearly with |y J/ψ| from 6.5 to 4.5 GeV/c; and 1.43 < |y J/ψ| < 2.2 for p T J/ψ> 4.5 GeV/c. The total cross section, assuming unpolarized prompt J/ψ pair production is 1.49 ± 0.07 (stat) ±0.13 (syst) nb. Different assumptions about the J/ψ polarization imply modifications to the cross section ranging from -31% to +27%. [Figure not available: see fulltext.] © 2014 The Author(s).
ISSN: 1029-8479
Appears in Collections:Mathematics / Matematik
Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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