Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at √s = 7 TeV
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10.1140%2Fepjc%2Fs10052-012-2251-3.pdf
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Author(s)
CMS Collaboration
Apyan, Aram
Bauer, Gerry P
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
December 2012
Journal
European Physical Journal C: Particles and Fields
Publisher
Springer-Verlag
Citation
Chatrchyan, S. et al. “Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at √s = 7 TeV.” The European Physical Journal C 72, 12 (December 2012): 2251 © 2012 CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
A measurement is presented of the relative prompt production rate of χ c2 and χ c1 with 4.6 fb ⁻¹ of data collected by the CMS experiment at the LHC in pp collisions at √s = 7 TeV. The two states are measured via their radiative decays χ c →J/ψ+γ, with the photon converting into an e + e - pair for J/ψ rapidity |y(J/ψ)| < 1.0 and photon transverse momentum p T (γ) > 0.5 GeV/c. The measurement is given for six intervals of p T (J/ψ) between 7 and 25 GeV/c. The results are compared to theoretical predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1140/EPJC/S10052-012-2251-3
