Measurement of Wγ and Zγ production in proton-proton collisions at $$ \sqrt {s} = 7 $$ TeV with the ATLAS detector
We present studies of W and Z bosons with associated high energy photons produced in pp collisions at √s=7 TeV. The analysis uses 35 pb⁻¹ of data collected by the ATLAS experiment in 2010. The event selection requires W and Z bosons decaying into high p T leptons (electrons or muons) and a photon with E T > 15 GeV separated from the lepton(s) by a distance ΔR(l, γ) > 0.7 in η-Φ space. A total of 95 (97) pp → e ± νγ + X(pp → μ± νγ + X) and 25 (23) pp → e⁺ e⁻ γ + X(pp → μ⁺μ⁻ γ + X) event candidates are selected. The kinematic distributions of the leptons and photons and the production cross sections are measured. The data are found to agree with Standard Model predictions that include next-to-leading-order O(αα s ) contributions.
- Research Organization:
- Technical Information Center, U.S. Department of Energy
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- The ATLAS collaboration
- OSTI ID:
- 1184320
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2011, Issue 9; ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
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journal | February 2012 |
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journal | June 2013 |
Two-loop QCD helicity amplitudes for $ q\overline q $ → W ±γ and $ q\overline q $ → Z 0γ
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text | January 2012 |
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