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Measurement of the X(3872) production cross section via decays to J/ψπ[superscript] + π[superscript −] in pp collisions at √s =7 TeV

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; Klute, Markus; Krajczar, Krisztian F.; Levin, Andrew Michael; 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, Roger; Wyslouch, Boleslaw; Yang, Ming; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Wyslouch, Victoria; Chan, M.; Kim, Y.; ... Show more Show less
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Abstract
The production of the X(3872) is studied in pp collisions at √s = 7 TeV, using decays to J/ψπ[superscript] + π[superscript −], where the J/ψ decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8fb[superscript −1]. The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < pT < 50GeV and rapidity |y| < 1.2. The ratio of the X(3872) and ψ (2S) cross sections times their branching fractions into J/ψπ[superscript] + π[superscript −] is measured as a function of pT. In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of pT is extracted. The π[superscript] + π[superscript −] mass spectrum of the J/ψπ[superscript] + π[superscript −] system in the X(3872) decays is also investigated. Keyword: Hadron-Hardon Scattering
Date issued
2013-04
URI
http://hdl.handle.net/1721.1/116099
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
Chatrchyan, S. et al. “Measurement of the X(3872) production cross section via decays to J/ψπ[superscript] + π[superscript −] in pp collisions at √s =7 TeV.” Journal of High Energy Physics 2013, 4 (April 2013): 154 © 2013 CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1029-8479

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