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Title: | Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV |
Author: | Abellan Beteta, Carlos Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Domingo Bonal, Francesc Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Pie Valls, B. (Blai) Potterat, Cédric Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) Vázquez Gómez, Ricard Vilasis-Cardona, Xavier |
Keywords: | Hadrons Cromodinàmica quàntica Teoria quàntica de camps Gravitació Relativitat (Física) Teoria quàntica Hadrons Quantum chromodynamics Quantum field theory Gravitation Relativity (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<br>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 (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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