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

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Aaltonen , T , Mehtälä , P , Orava , R , Saarikko , H , Österberg , K & CDF Collaboration 2010 , ' Measurement of the WW+WZ Production Cross Section Using the lepton+jets Final State at CDF II ' , Physical Review Letters , vol. 104 , no. 10 , pp. 101801 . https://doi.org/10.1103/PhysRevLett.104.101801

Title: Measurement of the WW+WZ Production Cross Section Using the lepton+jets Final State at CDF II
Alternative title: Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II
Author: Aaltonen, Timo; Mehtälä, Petteri; Orava, Risto; Saarikko, Heimo; Österberg, Kenneth; CDF Collaboration
Contributor organization: Department of Physics
Helsinki Institute of Physics
Date: 2010-03-10
Language: eng
Number of pages: 8
Belongs to series: Physical Review Letters
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.104.101801
URI: http://hdl.handle.net/10138/24082
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\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.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 pp̅ collision data at √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 5.4σ and is the first observation of WW+WZ production using this signature. Combining the results gives σWW+WZ=16.0±3.3  pb, in agreement with the standard model prediction.
Description: Version publised by PRL; shortened with minor changes.
Subject: 114 Physical sciences
Peer reviewed: Yes
Usage restriction: restrictedAccess


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