Measurement of psi(2S) meson production in pp collisions at sqrt(s)=7 TeV

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,A Satta ,V N La Thi ,T Brambach ,A C Dos Reis ,D L Perego ,C Coca ,A Dosil Suárez ,G Alkhazov ,A Bay ,D Elsby ,D Van Eijk ,S Gregson ,G D Patel ,M Liles ,V Niess ,K Senderowska ,F Soomro ,N Chiapolini ,S Redford ,M O Bettler ,T Pilař ,M Straticiuc ,R Messi ,G Lanfranchi ,S Hansmann-Menzemer ,F Dupertuis ,V Fave ,M Merk ,S Filippov ,D Galli ,A D Nguyen ,M Shapkin ,L Carson ,B Souza De Paula ,A Phan ,M Szczekowski ,F Stagni ,N Tuning ,G Valenti ,I Videau ,T Lesiak ,E Santovetti ,R Ekelhof ,F Teubert ,R M D Mamunur ,A Richards ,P M Bjørnstad ,M Britsch ,M Patel ,J Prisciandaro ,M Zangoli ,A Shires ,J A Hernando Morata ,P Collins ,F Muheim ,B Couturier ,A Gallas Torreira ,B Rakotomiaramanana ,R Nandakumar ,E Rodrigues ,R Gauld ,U Uwer ,V Heijne ,G Polok ,E Hicks ,A Leflat ,Th Bauer ,M Needham ,C Bozzi ,A Zvyagin

doi:10.1140/epjc/s10052-012-2100-4,

Abstract

The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at sqrt(s)=7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb-1. The psi(2S) mesons are reconstructed in the decay channels psi(2S) -> mu+ mu- and psi(2S) -> J/psi pi+ pi-, with the J/psi meson decaying into two muons. Results are presented both for promptly produced psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(psi(2S)) psi(2S) X) = (2.73 +- 0.06 +- 0.16 +- 0.24) x 10^(-3), where the last uncertainty is due to the B(b -> J/psi X), B(J/psi -> mu+ mu-) and B(psi(2S) -> e+ e-) branching fraction uncertainties. All above results are corrected by an erratum included as an appendix.

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