Measurement of the high-mass Drell–Yan differential cross-section in pp collisions at with the ATLAS detector》.pdfVIP

Physics Letters B 725 (2013) 223–242 Contents lists available at SciVerse ScienceDirect Physics Letters B /locate/physletb Measurement of the high-mass Drell–Yan differential cross-section in pp collisions at √s = 7 TeV with the ATLAS detector ✩ .ATLAS Collaboration a r t i c l e i n f o a b s t r a c t Article history: This Letter reports a measurement of the high-mass Drell–Yan differential cross-section in proton–proton Received 17 May 2013 collisions at a centre-of-mass energy of 7 TeV at the LHC. Based on an integrated luminosity of 4.9 fb−1, Received in revised form 23 July 2013 the differential cross-section in the Z /γ ∗ → e+e− channel is measured with the ATLAS detector as a Accepted 24 July 2013 function of the invariant mass, mee , in the range 116 mee 1500 GeV, for a fiducial region in which Available online 1 August 2013 Editor: W.-D. Schlatter both the electron and the positron have transverse momentum pT 25 GeV and pseudorapidity |η| 2.5. A comparison is made to various event generators and to the predictions of perturbative QCD calculations at next-to-next-to-leading order. © 2013 CERN. Published by Elsevier B.V. All rights reserved. 1. Introduction