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Measurement of the relative prompt production rate of χ[subscript c2] and χ[subscript c1] in pp collisions at √s = 7TeV

Author(s)
Apyan, Aram; Bauer, Gerry P; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Krajczar, Krisztian F.; Li, W.; Luckey Jr, P David; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Rudolph, Matthew Scott; Stephans, George S. F.; Stoeckli, Fabian; Sumorok, Konstanty C; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wolf, R.; Wyslouch, Boleslaw; Yang, M.; Yilmaz, Yetkin; Yoon, Andrew; Zanetti, Marco; ... Show more Show less
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Alternative title
Measurement of the relative prompt production rate of χc2 and χc1 in pp collisions at √s = 7TeV
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Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/
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Abstract
A measurement is presented of the relative prompt production rate of χ[subscript c2] and χ[subscript c1] with 4.6 fb[superscript −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 χc → 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 pT(γ) > 0.5 GeV/c. The measurement is given for six intervals of pT(J/ψ) between 7 and 25 GeV/c. The results are compared to theoretical predictions.
Date issued
2012-11
URI
http://hdl.handle.net/1721.1/105482
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The CMS Collaboration et al. “Measurement of the Relative Prompt Production Rate of χ[subscript c2] and χ[subscript c1] in Pp Collisions at √s = 7 TeV.” The European Physical Journal C 72.12 (2012): n. pag. © 2012 CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1434-6044
1434-6052

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