%0 Journal Article %T Measurement of the WW plus WZ Production Cross Section Using the lepton plus jets Final State at CDF II %A CDF Collaboration (Aaltonen, T. et al %A Cabrera, S. %J Physical Review Letters %D 2010 %V 104 %N 10 %I Amer Physical Soc %@ 0031-9007 %G English %F CDFCollaborationAaltonen+Cabrera2010 %O ISI:000275543500009 %O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=293), last updated on Mon, 21 Feb 2011 12:23:22 +0000 %X 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 (p) over bar collision data at root 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. %R 10.1103/PhysRevLett.104.101801 %U http://arXiv.org/abs/0911.4449 %U https://doi.org/10.1103/PhysRevLett.104.101801 %P 101801-8pp