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

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

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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 photo...

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Bibliographic Details
Main Authors: 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
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: Springer-Verlag 2016
Online Access:http://hdl.handle.net/1721.1/105482
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0003-3681-0649
Description
Summary: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.

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