Measurement of the relative prompt production rate of χc2 and χc1 in pp collisions at √s = 7 TeV

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URI: https://hdl.handle.net/10902/29004
ISSN: 1434-6044
ISSN: 1434-6052
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Author
Chatrchyan, S.; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José Ibán; Calderón Tazón, AliciaAutoridad Unican; Chuang, S. H.; Duarte Campderros, Jorge; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, Gervasio; González Sánchez, Francisco JavierAutoridad Unican; Graziano, Alberto; Jordá Lope, Clara; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Muñoz Sánchez, Francisca Javiela; Rodrigo Anoro, TeresaAutoridad Unican; [et al.]
Date
2012
Derechos
Atribución-NoComercial 3.0 España. © CERN for the benefit of the CMS collaboration 2012. This article is published with open access at Springerlink.com
Publicado en
European Physical Journal C, 2012, 72, 2251
Publisher
Springer New York LLC
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Abstract:
A measurement is presented of the relative prompt production rate of χc2 and χc1 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 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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Atribución-NoComercial 3.0 España. © CERN for the benefit of the CMS collaboration 2012. This article is published with open access at Springerlink.comExcept where otherwise noted, this item's license is described as Atribución-NoComercial 3.0 España. © CERN for the benefit of the CMS collaboration 2012. This article is published with open access at Springerlink.com