Measurement of the relative prompt production rate of chi(c2) and chi(c1) in pp collisions at root s=7 TeV
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Date
2012
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Publisher
Springer
Abstract
Ameasurement is presented of the relative prompt production rate of chi(c2) and chi(c1) with 4.6 fb(-1) of data collected by the CMS experiment at the LHC in pp collisions at root s = 7 TeV. The two states are measured via their radiative decays chi(c) -> J/psi + gamma, with the photon converting into an e(+)e(-) pair for J/psi rapidity \y(J/psi)\ < 1.0 and photon transverse momentum p(T)(gamma) > 0.5 GeV/c. The measurement is given for six intervals of p(T)(J/psi) between 7 and 25 GeV/c. The results are compared to theoretical predictions.
Description
Keywords
Physics, Particles & Fields
Citation
Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hammer, J., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., … Swanson, J. (2012). Measurement of the relative prompt production rate of χ c2 and χ c1 in pp collisions at $\sqrt{s} = 7\ \mathrm{TeV}$. In The European Physical Journal C (Vol. 72, Issue 12). Springer Science and Business Media LLC. https://doi.org/10.1140/epjc/s10052-012-2251-3