  This Letter reports a measurement of the high-mass Drell-Yan differential
cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV
at the LHC. Based on an integrated luminosity of 4.9 /fb, the differential
cross-section in the Z/gamma* to e+e- channel is measured with the ATLAS
detector as a function of the invariant mass, Mee, in the range 116 < Mee <
1500 GeV, for a fiducial region in which both the electron and the positron
have transverse momentum pT > 25 GeV and pseudorapidity eta < 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.
