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

Aad, G.

doi:10.1007/JHEP06(2014)112

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

Journal Article · Wed Jun 18 00:00:00 EDT 2014 · Journal of High Energy Physics

DOI: https://doi.org/10.1007/JHEP06(2014)112 · OSTI ID:1166980

Aad, G. ^[1]

et al.

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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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: ATLAS Collaboration

Grant/Contract Number:: AC02-98CH10886

OSTI ID:: 1166980

Report Number(s):: BNL--107289-2014-JA; KA1101021

Journal Information:: Journal of High Energy Physics, Journal Name: Journal of High Energy Physics; ISSN 1126-6708

Publisher:: Societa Italiana di PhysicaCopyright Statement

Country of Publication:: United States

Language:: English

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