Measurement of W Plus [gamma] Production in Proton-antiproton Collisions at [square Root Of] S
Author: Michael H. Kirby
Publisher:
Published: 2004
Total Pages: 372
ISBN-13:
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Author: Michael H. Kirby
Publisher:
Published: 2004
Total Pages: 372
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DOWNLOAD EBOOKAuthor: Rowan T. Hamilton
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Published: 1996
Total Pages: 240
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DOWNLOAD EBOOKAuthor: Qiang Zhu
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Published: 1994
Total Pages: 101
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Published: 2011
Total Pages: 32
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DOWNLOAD EBOOKA measurement of W-gamma and Z-gamma production in proton-proton collisions at sqrt(s) = 7 TeV is presented. Results are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 inverse picobarns. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy>10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle>0.7, and with an additional dilepton invariant mass requirement of> 50 GeV for the Z-gamma process. The following cross section times branching fraction values are found: sigma(pp to W-gamma+X) B(W to lepton neutrino) = 56.3 +/- 5.0 (stat.) +/- 5.0 (syst.) +/- 2.3 (lumi.) pb and sigma(pp to Z-gamma+X) B}(Z to lepton lepton) = 9.4 +/- 1.0 (stat.) +/- 0.6 (syst.) +/- 0.4 (lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW gamma, ZZ gamma, and Z gamma gamma trilinear gauge couplings at sqrt(s) = 7 TeV are set.
Author: Jie Yang
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Published: 1995
Total Pages: 212
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DOWNLOAD EBOOKAuthor: Markus Klute
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Published: 2004
Total Pages: 160
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DOWNLOAD EBOOKAuthor: Liqun Zhang
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Published: 1997
Total Pages: 350
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DOWNLOAD EBOOKAuthor: Michael H. Kirby
Publisher:
Published: 2004
Total Pages: 212
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DOWNLOAD EBOOKThe authors present a measurement of the {bar p}p {yields} W{gamma} + X {yields} e{nu}{gamma} + X production cross section using data form the Collider Detector at Fermilab. The p{bar p} collisions were provided by the Tevatron Collider at a center of mass energy of 1.96 TeV. Electroweak theory includes the trilinear vector boson coupling, WW{gamma}, which contributes to the e{nu}{gamma} final state. The electron decay channel of the W provides a clean sample to study the production of diboson pairs. The measurement of the production cross section tests the structure of the non-Abelian character of Electroweak theory.
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Published: 2005
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Author: Mircea Norocel Coca
Publisher:
Published: 2005
Total Pages: 416
ISBN-13:
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