Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/58783
 Title: Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV Author: Abellan Beteta, CarlosCalvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertDomingo Bonal, FrancescGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasPérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPie Valls, B. (Blai)Potterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vázquez Gómez, RicardVilasis-Cardona, Xavier Keywords: HadronsCromodinàmica quànticaTeoria quàntica de campsGravitacióRelativitat (Física)Teoria quànticaHadronsQuantum chromodynamicsQuantum field theoryGravitationRelativity (Physics)Quantum theory Issue Date: Feb-2013 Publisher: Springer Verlag Abstract: A measurement of the cross-section for pp → Z → e+e− is presented using data at s√=7 TeV corresponding to an integrated luminosity of 0.94 fb−1. The process is measured within the kinematic acceptance p T > 20 GeV/c and 2 < η < 4.5 for the daughter electrons and dielectron invariant mass in the range 60
120 GeV/c 2. The cross-section is determined to be $\sigma \left( {\mathrm{pp}\to \mathrm{Z}\to {{\mathrm{e}}^{+}}{{\mathrm{e}}^{-}}} \right)=76.0\pm 0.8\pm 2.0\pm 2.6\;\mathrm{pb}$ where the first uncertainty is statistical, the second is systematic and the third is the uncertainty in the luminosity. The measurement is performed as a function of Z rapidity and as a function of an angular variable which is closely related to the Z transverse momentum. The results are compared with previous LHCb measurements and with theoretical predictions from QCD. Note: Reproducció del document publicat a: http://dx.doi.org/10.1007/JHEP02(2013)106 It is part of: Journal of High Energy Physics, 2013, vol. 2013, num. 2, p. 106 URI: http://hdl.handle.net/2445/58783 Related resource: http://dx.doi.org/10.1007/JHEP02(2013)106 ISSN: 1126-6708 Appears in Collections: Articles publicats en revistes (Física Quàntica i Astrofísica)Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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