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Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV

Abstract : A measurement of the cross-section for pp->Z->e+e- is presented using data at sqrt{s}=7TeV corresponding to an integrated luminosity of 0.94 fb^{-1}. The process is measured within the kinematic acceptance pT>20GeV/c and 2<\eta<4.5 for the daughter electrons and dielectron invariant mass in the range 60--120GeV/c^2. The cross-section is determined to be \sigma(pp->Z->e+e-)=76.0+-0.8+-2.0+-2.6pb 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.
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http://hal.in2p3.fr/in2p3-00768304
Contributor : Sabine Starita <>
Submitted on : Friday, December 21, 2012 - 11:07:12 AM
Last modification on : Wednesday, September 16, 2020 - 4:24:37 PM

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R. Aaij, S. Barsuk, O. Callot, J. He, J. Lefrançois, et al.. Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV. Journal of High Energy Physics, Springer, 2013, 02, pp.106. ⟨10.1007/JHEP02(2013)106⟩. ⟨in2p3-00768304⟩

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