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 be sigma(pp -> Z -> e(+)e(-)) = 76.0 +/- 0.8 +/- 2.0 +/- 2.6 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.

Aaij, R., Carboni, G., Santovetti, E., & Ii, (2013). Measurement of the cross-section for Z -> e(+)e(-) production in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS(2) [10.1007/JHEP02(2013)106].

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

CARBONI, GIOVANNI;SANTOVETTI, EMANUELE;
2013

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 be sigma(pp -> Z -> e(+)e(-)) = 76.0 +/- 0.8 +/- 2.0 +/- 2.6 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.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - Fisica Nucleare e Subnucleare
eng
Aaij, R., Carboni, G., Santovetti, E., & Ii, (2013). Measurement of the cross-section for Z -> e(+)e(-) production in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS(2) [10.1007/JHEP02(2013)106].
Aaij, R; Carboni, G; Santovetti, E; Ii,
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/135871
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