Measurement of the WW+WZ Production Cross Section Using the lepton+jets Final State at CDF II
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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 pp collision data at square root of 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 5.4sigma 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.
author list (cited authors)
Aaltonen, T., Adelman, J., González, B., Amerio, S., Amidei, D., Anastassov, A., ... Zucchelli, S.