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

• Main Authors: Paus, Christoph M. E. (Contributor), Bauer, Gerry P. (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Makhoul, K. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-10-01T19:42:39Z.
• Subjects: Article
• Online Access: Get fulltext

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[over-bar] 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 5.4sigmaand is the first observation of WW+WZ production using this signature. Combining the results gives sigmaWW+WZ=16.0±3.3  pb, in agreement with the standard model prediction.
Fermi National Accelerator Laboratory
United States. Dept. of Energy
National Science Foundation (U.S.)
Istituto Nazionale di Fisica Nucleare of Italy
Ministry of Education, Culture, Sports, Science and Technology of Japan
Natural Sciences and Engineering Research Council of Canada
National Science Council of Taiwan
Swiss National Science Foundation
Alfred P. Sloan Foundation
Bundesministerium für Bildung und Forschung, Germany
World Class University Program (Korea)
National Research Foundation of Korea
Science and Technology Facilities Council, United Kingdom
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Russian Foundation for Basic Research
Ministerio de Ciencia e Innovación, Spain
Programa Consolider-Ingenio 2010, Spain
Slovak R&D Agency
Academy of Finland