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| Author | : Anne Kathrin Becker |
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| Total Pages | : 0 |
| Release | : 2019 |
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| Author | : Alexander Sood |
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| Total Pages | : 155 |
| Release | : 2014 |
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This dissertation presents a measurement of \ssWW production in proton-proton collisions with a center-of-mass energy of 8 TeV at the Large Hadron Collider using the ATLAS detector. The $W$ bosons are required to decay leptonically, giving a signature of two leptons of the same electric charge, two jets, and missing transverse energy. The analysis is performed on the entire 8 TeV dataset, corresponding to an integrated luminosity of 20.3 fb$^{-1}$. The cross section is measured in two fiducial regions, and an excess over the background-only prediction is observed with a significance of 4.5$\sigma$ for inclusive \ssWW production and 3.6$\sigma$ for electroweak \ssWW production. The measured cross sections are in agreement with Standard Model predictions, and limits are set on anomalous quartic gauge couplings.
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| Release | : 2015 |
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The purely electroweak (EW) cross section for the production of two jets in association with a Z boson, in proton-proton collisions at [arrow]" = 8 TeV, is measured using data recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 19.7 fb-1. The electroweak cross section for the lljj final state (with l = e or [mu] and j representing the quarks produced in the hard interaction) in the kinematic region defined by Mll> 50 GeV, Mjj> 120 GeV, transverse momentum pTj> 25 GeV, and pseudorapidity.
| Author | : Albert M. Sirunyan |
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| Release | : 2019 |
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| Total Pages | : 9 |
| Release | : 1996 |
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The production properties of jets produced in p{ovr p} collisions at (square root)s = 1.8 TeV have been measured using the CDF detector. The data are compared to predictions of leading order and next to leading order QCD predictions. Both inclusive jets and those produced in association with W and Z bosons are used for this analysis. In general, good agreement with QCD predictions is found except for very high E{sub t} inclusive jets. 10 refs., 7 figs., 2 tabs.
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| Release | : 2016 |
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The production cross section of a W boson in association with two b jets is measured using a sample of proton-proton collisions at $ \sqrt{s} = $ 8 TeV collected by the CMS experiment at the CERN LHC. The data sample corresponds to an integrated luminosity of 19.8 fb$^{-1}$. The W bosons are reconstructed via their leptonic decays, $ \mathrm{ W }\to\ell\nu $, where $\ell=\mu$ or $\mathrm{ e }$. The fiducial region studied contains exactly one lepton with transverse momentum $ p_{\mathrm{T}}^{\ell}> $ 30 GeV and pseudorapidity $
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| Release | : 2014 |
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This paper presents the first study of W± W± jj, same-electric-charge diboson production in association with two jets, using 20.3 fb−1 of proton-proton collision data at √s= 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e± e± , e± [mu]± , and [mu]± [mu]± ) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W± W± jj production and electroweak-only W± W± jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings.
| Author | : [Study Group] ATLAS Collaboration CERN |
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| Total Pages | : 0 |
| Release | : 2022 |
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Abstract: This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Events with two same-sign leptons (electrons or muons) and at least two jets, as well as events with three charged leptons, are selected. A multivariate technique is then used to discriminate between signal and background events. Events from WWW production are observed with a significance of 8.0 standard deviations, where the expectation is 5.4 standard deviations. The inclusive WWW production cross section is measured to be 820±100 (stat)±80 (syst) fb, approximately 2.6 standard deviations from the predicted cross section of 511±18 fb calculated at next-to-leading-order QCD and leading-order electroweak accuracy
| Author | : Philip Sommer |
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| Total Pages | : |
| Release | : 2016 |
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Zusammenfassung: In this thesis, measurements of the W boson pair production cross section in proton-proton collisions at a centre-of-mass energy of 8 TeV are presented. A dataset corresponding to an integrated luminosity of 22.3 /fb recorded by the ATLAS experiment in the year 2012 is used. The W bosons are identified by their decay products of exactly two leptons with opposite electrical charge, electrons or muons, and missing transverse momentum induced by their corresponding neutrinos. First, a measurement restricted to final states without hadronic jets is presented and differential fiducial cross sections, total cross sections and limits on anomalous triple gauge boson couplings are obtained. A second measurement of the fiducial cross section in association with exactly one hadronic jet is presented. The ratio of fiducial cross sections for different jet multiplicities is reported and the combined fiducial cross section is extrapolated to the total phase space.
| Author | : Albert M. Sirunyan |
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| Release | : 2021 |
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