Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at [Formula: see text].

Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at [Formula: see text].

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 [Formula: see text]. The two states are measured via their radiative decays χ c→J/ψ+γ, with the photon converting into an e(+)e(-)...

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Bibliographic Details
Main Authors: Chatrchyan, S, Khachatryan, V, Sirunyan, A, Tumasyan, A, Adam, W, Aguilo, E, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, V, Hammer, J, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Knünz, V, Krammer, M, Krätschmer, I, Liko, D, Mikulec, I, Pernicka, M, Rahbaran, B
Format: Journal article
Language:English
Published: 2012
Description
Summary: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 [Formula: see text]. 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.

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