Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

Details Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with ATLAS Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

2011-04-27

arxiv.org/abs/1104.5225v1

Phys.Rev.Lett. 107 (2011) 041802

Physics

High Energy Physics

High Energy Physics - Experiment

4.5 pages plus author list (18 pages total), 6 figures, 1 table, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.107.041802

This Letter presents a measurement of the $\WW$ production cross section in $\sqrt{s} = 7 \TeV\ pp$ collisions by the ATLAS experiment, using 34 $\pbi$ of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of $1.7\pm0.6$ events. The measured cross section is $41^{+20}_{-16}(\mathrm{stat.})\pm 5(\mathrm{syst.})\pm 1(\mathrm{lumi.})$ pb, which is consistent with the standard model prediction of $44 \pm 3$ pb calculated at next-to-leading order in QCD.

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