Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II

Details Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II

2009-11-23

arxiv.org/abs/0911.4449v2

Phys.Rev.Lett.104:101801,2010

Physics

High Energy Physics

High Energy Physics - Experiment

Version publised by PRL; shortened with minor changes.

Scientific paper

10.1103/PhysRevLett.104.101801

We report two complementary measurements of the WW+WZ cross section in the final state consisting of an electron or muon, missing transverse energy, and jets, performed using p\bar{p} collision data at sqrt{s} = 1.96 TeV collected by the CDF II detector. The first method uses the dijet invariant mass distribution while the second more sensitive method uses matrix-element calculations. The result from the second method has a signal significance of 5.4 sigma and is the first observation of WW+WZ production using this signature. Combining the results gives sigma_{WW+WZ} = 16.0 +/- 3.3 pb, in agreement with the standard model prediction.

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