Search for hadronic decays of W and Z bosons in photon events in pp collisions at {radical}(s)=1.96 TeV

Journal Article · Tue Sep 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.052011· OSTI ID:21322560

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Kim, Y K; Kwang, S; Levy, S; Paramonov, A A; Schmidt, M A; Shochet, M; Wolfe, C; Yang, U K; Yorita, K ^[2]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

We report on a search for the process pp{yields}{gamma}+W/Z with W/Z{yields}qq in events containing two jets and a photon at the center-of-mass energy {radical}(s)=1.96 TeV, using 184 pb{sup -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 {gamma}+W/Z production cross section with the W and Z decaying hadronically.

• OSTI ID: 21322560
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevD.80.052011; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
FERMILAB COLLIDER DETECTOR
HADRONIC PARTICLE DECAY
NEURAL NETWORKS
PHOTONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
SENSITIVITY
SIGNAL-TO-NOISE RATIO
TEV RANGE 01-10
Z NEUTRAL BOSONS