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2013-02

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cc by (c) LHCb Collaboration, 2013
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/58783

Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV

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http://dx.doi.org/10.1007/JHEP02(2013)106

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.

Subject

Hadrons, Cromodinàmica quàntica, Teoria quàntica de camps, Gravitació, Relativitat (Física), Teoria quàntica

Subject (English)

Hadrons, Quantum chromodynamics, Quantum field theory, Gravitation, Relativity (Physics), Quantum theory

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

ABELLAN BETETA, Carlos, et al. Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV. Journal of High Energy Physics. 2013. Vol. 2013, num. 2, pags. 106. ISSN 1126-6708. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/58783

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