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.

Measurement of the WW plus WZ Production Cross Section Using the lepton plus jets Final State at CDF II / Aaltonen, T., Adelman, J., Gonzalez, B.a., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Badgett, W., BARBARO GALTIERI, A., Barnes, V.e., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 104:(2010). [10.1103/physrevlett.104.101801]

Measurement of the WW plus WZ Production Cross Section Using the lepton plus jets Final State at CDF II

DE CECCO, Sandro;GIAGU, Stefano;MARGAROLI, Fabrizio;IORI, Maurizio;
2010

Abstract

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.
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the WW plus WZ Production Cross Section Using the lepton plus jets Final State at CDF II / Aaltonen, T., Adelman, J., Gonzalez, B.a., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Badgett, W., BARBARO GALTIERI, A., Barnes, V.e., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 104:(2010). [10.1103/physrevlett.104.101801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/104364
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