Measurement of the low-mass Drell-Yan differential cross section at $\sqrt{s}$ = 7 TeV using the ATLAS detector

Abstract

The differential cross section for the process $Z/{\gamma }^{\ast }\to ll$ ($l=e,\mu$) as a function of dilepton invariant mass is measured in pp collisions at $\sqrt{s}=$ 7 TeV at the LHC using the ATLAS detector. The measurement is performed in the $e$ and $\mu$ 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.

32 pages plus author list (53 pages total), 7 figures, 13 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2011-41/

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• An NNLO subtraction formalism in hadron collisions and its application to Higgs boson production at the LHC
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• MCFM for the Tevatron and the LHC
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• NLO vector-boson production matched with shower in POWHEG
• Parton Distributions for LO Generators
• QCDNUM: Fast QCD Evolution and Convolution
• Determination of the strange quark density of the proton from ATLAS measurements of the W->l nu and Z->ll cross sections
• Inclusive $W$ and $Z$ production in the forward region at $\sqrt{s}=7$ TeV
• Improved iterative Bayesian unfolding
• Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV
• The Quark and Gluon Structure of the Proton

Cited by in corpus (10)

• The PDF4LHC21 combination of global PDF fits for the LHC Run III
• Measurements of differential and double-differential Drell-Yan cross sections in proton-proton collisions at 8 TeV
• Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at sqrt(s) = 7 TeV
• Searching for dilepton resonances below the Z mass at the LHC
• PDF uncertainties on the W boson mass measurement from the lepton transverse momentum distribution
• Measurement of the mass dependence of the transverse momentum of lepton pairs in Drell-Yan production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Future tests of parton distributions
• Parton distribution functions and constraints on the intrinsic charm content of the proton using BHPS approach
• Probing the photonic content of the proton using photon-induced dilepton production in $p+\text{Pb}$ collisions at the LHC
• The Forward Physics Facility at the High-Luminosity LHC