Measurement of the low-mass Drell-Yan differential cross section at $\sqrt{s}$ = 7 TeV using the ATLAS detector
(2014) Journal of High Energy Physics — Vol. 06 (2014)
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- 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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Tanasijczuk, A. J., ATLAS, & et al. (2014). Measurement of the low-mass Drell-Yan differential cross section at $\sqrt{s}$ = 7 TeV using the ATLAS detector. Journal of High Energy Physics, 06. https://doi.org/10.1007/JHEP06(2014)112 (Original work published 2014)