Search for hadronic decays of W and Z bosons in photon events in pp-bar collisions at sqrt[s]=1.96 TeV

Search for hadronic decays of W and Z bosons in photon events in pp-bar collisions at sqrt[s]=1.96 TeV

We report on a search for the process pp̅ →γ+W/Z with W/Z→qq̅ in events containing two jets and a photon at the center-of-mass energy √s=1.96  TeV, using 184  pb[superscript -1] of data collected by the CDF II detector. A neural network event selection has been developed to optimize the rejection of...

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Bibliographic Details
Main Authors: Miles, Christopher J. (Contributor), Makhoul, K. (Contributor), Leonardo, N. (Contributor), Knuteson, Bruce O. (Contributor), Klute, Markus (Contributor), Iyutin, Boris (Contributor), Henderson, C. (Contributor), Hahn, Kristian Allan (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Choudalakis, Georgios (Contributor), Bolshov, Arkadiy (Contributor), Bauer, Gerry P. (Contributor), Paus, Christoph M. E. (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, 2010-03-01T21:44:13Z.
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Summary:We report on a search for the process pp̅ →γ+W/Z with W/Z→qq̅ in events containing two jets and a photon at the center-of-mass energy √s=1.96  TeV, using 184  pb[superscript -1] of data collected by the CDF II detector. A neural network event selection has been developed to optimize the rejection of the large QCD production background; it is shown that this method gives a significant improvement in both signal-to-noise ratio and signal sensitivity, as compared with an event selection based on conventional cuts. An upper limit is presented for the γ+W/Z production cross section with the W and Z decaying hadronically.
Academy of Finland
Slovak R&D Agency
Programa Consolider-Ingenio 2010, Spain
Ministerio de Ciencia e Innovación, Spain
Russian Foundation for Basic Research
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Royal Society, United Kingdom
Science and Technology Facilities Council, United Kingdom
Korean Research Foundation
Korean Science and Engineering Foundation
Bundesministerium für Bildung und Forschung, Germany
Alfred P. Sloan Foundation
Swiss National Science Foundation
National Science Council of the Republic of China
Natural Sciences and Engineering Research Council of Canada
Ministry of Education, Culture, Sports, Science and Technology of Japan
Italian Istituto Nazionale di Fisica Nucleare
National Science Foundation
United States Department of Energy

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