Journal of High Energy Physics > 2014 > 2014 > 6 > 1-46
Measurement of the low-mass Drell-Yan differential cross section at s $$ \sqrt{s} $$ = 7 TeV using the ATLAS detector
Source
Abstract
The differential cross section for the process Z/γ ∗ → ℓℓ (ℓ = e, μ) as a function of dilepton invariant mass is measured in pp collisions at s $$ \sqrt{s} $$ = 7 TeV at the LHC using the ATLAS detector. The measurement is performed in the e and μ channels for invariant masses between 26 GeV and 66 GeV using an integrated luminosity of 1.6 fb−1 collected in 2011 and these measurements are combined. The analysis is extended to invariant masses as low as 12 GeV in the muon channel using 35 pb−1 of data collected in 2010. The cross sections are determined within fiducial acceptance regions and corrections to extrapolate the measurements to the full kinematic range are provided. Next-to-next-to-leading-order QCD predictions provide a significantly better description of the results than next-to-leading-order QCD calculations, unless the latter are matched to a parton shower calculation.
Identifiers
journal e-ISSN : | 1029-8479 |
DOI | 10.1007/JHEP06(2014)112 |
Authors
B. Abbott
- University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Norman, United States of America