Measurement of the cross-section for Z -> e(+)e(-) production in pp collisions at root s=7 TeV

LHCb collaboration

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Abstract

A measurement of the cross-section for pp -> Z -> e(+)e(-) is presented using data at root 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 < eta < 4.5 for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/c(2). The cross-section is determined to besigma(pp -> Z -> e(+)e(-)) = 76.0 +/- 0.8 +/- 2.0 +/- 2.6 pbwhere 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.
Original languageEnglish
Article number106
Number of pages20
JournalJournal of High Energy Physics
Issue number2
DOIs
Publication statusPublished - 1 Feb 2013
Externally publishedYes

Keywords

  • Electroweak interaction
  • Hadron-Hadron Scattering
  • QCD

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