Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/99265
Title: Measurement of ψ(2S) meson production in pp collisions at √s=7 TeV
Author: Abellan Beteta, Carlos
Calvo Gómez, M.
Camboni, Alessandro
Comerma Montells, Albert
Bonal, F.
Garrido Beltrán, Lluís
Gascon, D.
Grabalosa Gándara, Marc
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Lopez Asamar, E.
Pérez-Calero Yzquierdo, Antonio
Pie Valls, B. (Blai)
Potterat, Cédric
Puig Navarro, A.
Rosello, M.
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, R.
Vilasis-Cardona, X.
LHCb Collaboration
Keywords: Teoria quàntica de camps
Gravitació
Relativitat (Física)
Teoria quàntica
Hadrons
Quantum field theory
Gravitation
Relativity (Physics)
Quantum theory
Hadrons
Issue Date: Apr-2012
Publisher: Società Italiana di Fisica & Springer Verlag
Abstract: The differential cross-section for the inclusive production of ψ(2S) mesons in pp collisions at s√=7 TeVs=7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb−1. The ψ(2S) mesons are reconstructed in the decay channels ψ(2S)→μ + μ − and ψ(2S)→J/ψπ + π −, with the J/ψ meson decaying into two muons. Results are presented both for promptly produced ψ(2S) mesons and for those originating from b-hadron decays. In the kinematic range p T(ψ(2S))≤16 GeV/c and 2<y(ψ(2S))≤4.5 we measure https://static-content.springer.com/image/art%3A10.1140%2Fepjc%2Fs10052-012-2100-4/MediaObjects/10052_2012_2100_Equa_HTML.gif where the last uncertainty on the prompt cross-section is due to the unknown ψ(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/ψ measurements we determine the inclusive branching fraction https://static-content.springer.com/image/art%3A10.1140%2Fepjc%2Fs10052-012-2100-4/MediaObjects/10052_2012_2100_Equb_HTML.gif where the last uncertainty is due to the (b→J/ψX)B(b→J/ψX) , (J/ψ→μ+μ−)B(J/ψ→μ+μ−) and (ψ(2S)→e+e−)B(ψ(2S)→e+e−) branching fraction uncertainties.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1140/epjc/s10052-012-2100-4
It is part of: European Physical Journal C, 2012, vol. 72, p. 2100
Related resource: http://dx.doi.org/10.1140/epjc/s10052-012-2100-4
URI: http://hdl.handle.net/2445/99265
ISSN: 1434-6044
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Electrònica)

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