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Measurement of the low-mass Drell-Yan differential cross section at s√ = 7 TeV using the ATLAS detector

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Article number112
<mark>Journal publication date</mark>18/06/2014
<mark>Journal</mark>Journal of High Energy Physics
Issue number6
Volume2014
Number of pages46
Publication StatusPublished
<mark>Original language</mark>English

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√ = 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.

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The original publication is available at www.link.springer.com JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0