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Measurement of the prompt J/Psi and Psi(2S) polarizations in pp collisions at root s=7 TeV

Abstract: The polarizations of prompt J/? and ?(2S) mesons are measured in proton-proton collisions at s=7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb-1. The prompt J/? and ?(2S) polarization parameters ??{symbol}, ??, and ??{symbol}?, as well as the frame-invariant quantity ?~, are measured from the dimuon decay angular distributions in three different polarization frames. The J/? results are obtained in the transverse momentum range 14

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Rabady D., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Treberer-Treberspurg W., Waltenberger W., Wulz C.E., Mossolov V., Shumeiko N., Suare

Fuente: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2013 727(4-5), 381-402

Publisher: Elsevier

Publication date: 01/12/2013

No. of pages: 22

Publication type: Article

DOI: 10.1016/j.physletb.2013.10.055

ISSN: 0370-2693,1873-2445

Publication Url: https://doi.org/10.1016/j.physletb.2013.10.055

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