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 pT>20GeV/c and 2<η<4.5 for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/c2. The cross-section is determined to be σ(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.

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

BALDINI, Wander;BOZZI, Concezio;SAVRIE', Mauro;
2013

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 pT>20GeV/c and 2<η<4.5 for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/c2. The cross-section is determined to be σ(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.
2013
R., Aaij; C., Abellan Beteta; A., Adametz; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2097612
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