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Title: Measurement of forward W and Z boson production in pp collisions at (Formula Presented.) TeV
Author: Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marín Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
LHCb Collaboration
Keywords: Col·lisions (Física)
Interaccions d'hadrons
Collisions (Physics)
Hadron interactions
Issue Date: 26-Jan-2016
Publisher: Springer Verlag
Abstract: Measurements are presented of electroweak boson production using data from pp collisions at a centre-of-mass energy of s√=8s=8 TeV. The analysis is based on an integrated luminosity of 2.0 fb−1 recorded with the LHCb detector. The bosons are identified in the W → μν and Z → μ + μ − decay channels. The cross-sections are measured for muons in the pseudorapidity range 2.0 < η < 4.5, with transverse momenta p T > 20 GeV/c and, in the case of the Z boson, a dimuon mass within 60<Mμ+μ−<12060<Mμ+μ−<120 GeV/c 2. The results are σW+→μ+ν=1093.6±2.1±7.2±10.9±12.7pb,σW−→μ−ν¯¯¯=818.4±1.9±5.0±7.0±9.5pb,σZ→μ+μ−=95.0±0.3±0.7±1.1±1.1pb, σW+→μ+ν=1093.6±2.1±7.2±10.9±12.7pb,σW−→μ−ν¯=818.4±1.9±5.0±7.0±9.5pb,σZ→μ+μ−=95.0±0.3±0.7±1.1±1.1pb, where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination. The evolution of the W and Z boson cross-sections with centre-of-mass energy is studied using previously reported measurements with 1.0 fb−1 of data at 7 TeV. Differential distributions are also presented. Results are in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics.
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It is part of: Journal of High Energy Physics, 2016, vol. 2016, num. 155
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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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