Measurement of Z{gamma} production in pp collisions at {radical}(s)=1.96 TeV

Journal Article · Sun Aug 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.031103· OSTI ID:21432824

Aaltonen, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; van Remortel, N ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Hurwitz, M; Ketchum, W; Kim, Y K; Krop, D; Kwang, S; Lee, H S; Schmidt, M A; Shiraishi, S; Shochet, M; Tang, J ^[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)

The production rate and kinematics of photons produced in association with Z bosons are studied using 2 fb{sup -1} of pp collision data collected at the Collider Detector at Fermilab. The cross section for pp{yields}l{sup +}l{sup -}{gamma}{sup +}X (where the leptons l are either muons or electrons with dilepton mass M{sub ll}>40 GeV/c{sup 2}, and where the photon has transverse energy E{sub T}{sup {gamma}}>7 GeV and is well separated from the leptons) is 4.6{+-}0.2(stat){+-}0.3(syst){+-}0.3(lum) pb, which is consistent with standard model expectations. We use the photon E{sub T} distribution from Z{gamma} events where the Z has decayed to {mu}{sup +}{mu}{sup -}, e{sup +}e{sup -}, or {nu}{nu} to set limits on anomalous (non standard model) trilinear couplings between photons and Z bosons.

• OSTI ID: 21432824
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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