Measurement of forward Z → e[superscript +]e[superscript −] production at √s = 8 TeV
Author(s)Counts, Ian Thomas Hunt; Ilten, Philip James; Williams, Michael
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A measurement of the cross-section for Z-boson production in the forward region of pp collisions at 8 TeV centre-of-mass energy is presented. The measurement is based on a sample of Z → e[superscript +]e[superscript −] decays reconstructed using the LHCb detector, corresponding to an integrated luminosity of 2.0 fb[superscript −1]. The acceptance is defined by the requirements 2.0 < η < 4.5 and p [subscript T] > 20 GeV for the pseudorapidities and transverse momenta of the leptons. Their invariant mass is required to lie in the range 60-120 GeV. The cross-section is determined to be σ(pp → Z → e[superscript +]e[superscript −]) = 93.81 ± 0.41(stat) ± 1.48(syst) ± 1.14(lumi) pb, where the first uncertainty is statistical and the second reflects all systematic effects apart from that arising from the luminosity, which is given as the third uncertainty. Differential cross-sections are presented as functions of the Z-boson rapidity and of the angular variable ϕ [superscript ∗], which is related to the Z-boson transverse momentum.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal of High Energy Physics
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Measurement of Forward Z → e[superscript +]e[superscript −] Production at √s = 8 TeV.” J. High Energ. Phys. 2015, no. 5 (May 2015). © CERN, for the benefit of the LHCb Collaboration
Final published version