Abstract
Measurements of Drell-Yan lepton-pair production cross sections and associated angular correlations can provide unique insight into perturbative Quantum Chromodynamics in the absence of colour flow between initial and final states, the V-A nature of electroweak interactions, as well as enhance the knowledge of parton distribution functions in the proton. Drell-Yan production is also an important source of background for other Standard-Model processes such as Higgs-boson production as well as for new phenomena, particularly at high dilepton invariant mass, and so must be evaluated precisely at the Large Hadron Collider. The measurements presented in this note are based on approximately 5 fb-1 of data collected at a centre-of-mass energy of 7 TeV in 2011 with the ATLAS detector based at the CERN Laboratory.
Highlights
IntroductionSuch datasets enable detailed comparisons to next-to-next-toleading-order calculations, leading and next-to-leadingorder Monte Carlo (MC) generator predictions, and various parton distribution function parameterisations
The results presented in this note are based on approximately 5 fb−1√of data collected in 2011 at a centre-ofmass energy s = 7 TeV with the ATLAS [1] experiment based at the Large Hadron Collider (LHC) at the CERN Laboratory
DrellYan lepton-pair production is an important source of background in many Standard-Model measurements as well as in searches for new physics, such as the production of the Z’ particle with Standard-Model Z couplings to fermions, which has been excluded by ATLAS at the 95% credibility level for masses below 2.86 TeV [5]
Summary
Such datasets enable detailed comparisons to next-to-next-toleading-order calculations, leading and next-to-leadingorder Monte Carlo (MC) generator predictions, and various parton distribution function parameterisations. It is of great interest to make precision measurements of the Drell-Yan process at LHC energies
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