Measurement of the relative prompt production rate of χ c2 and χ c1 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; Chan, Matthew Hans; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Krajczar, Krisztian F.; Li, Wei Jia; Luckey Jr, P David; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Rudolph, Maja; 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; ... Show more Show less
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
European Physical Journal C: Particles and Fields
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
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