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| Release | : 2001 |
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We present a preliminary result from a search for anomalous WW and WZ production in p[bar p] collisions at[radical]s= 1.8 TeV using p[bar p][yields] e[nu]jj events observed during the 1992-1993 run of the Fermilab Tevatron collider. A fit to the p[sub T] spectrum of W(e[nu]) yields direct limits on the CP-conserving anomalous WW[gamma] and WWZ coupling parameters of -0.89
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| Total Pages | : 126 |
| Release | : 1997 |
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A search for anomalous WW and WZ production in p{anti p} collisions at √s = 1.8 TeV using the D0 detector at Fermilab is presented. With a data sample of p{anti p} → e?jjX events corresponding to an integrated luminosity of 76.5 ± 4.1pb{sup −1}. 399 candidate events were identified, from which 387.1 ± 39.8 events were estimated to be background. No deviations from the Standard Model were seen, which predicts 16.2 ± 2.7 events. The 95% CL limit on the cross section?(p{anti p} → WW{sup −}X) was calculated to be 93.8 pb. Limits on the CP-conserving anomalous WW{sub?} and WWZ coupling parameters were obtained from a binned likelihood fit to the transverse momentum spectrum of the W boson. Assuming that the WW{sub?} and WWZ coupling parameters are equal, the 95% CL limits on the CP-conserving couplings are −0.56
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| Total Pages | : 126 |
| Release | : 1997 |
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A search for anomalous WW and WZ production in p{anti p} collisions at √s = 1.8 TeV using the D0 detector at Fermilab is presented. With a data sample of p{anti p} → e[nu]jjX events corresponding to an integrated luminosity of 76.5 ± 4.1pb−1. 399 candidate events were identified, from which 387.1 ± 39.8 events were estimated to be background. No deviations from the Standard Model were seen, which predicts 16.2 ± 2.7 events. The 95% CL limit on the cross section [sigma](p{anti p} → W+W−X) was calculated to be 93.8 pb. Limits on the CP-conserving anomalous WW{sub {gamma}} and WWZ coupling parameters were obtained from a binned likelihood fit to the transverse momentum spectrum of the W boson. Assuming that the WW{sub {gamma}} and WWZ coupling parameters are equal, the 95% CL limits on the CP-conserving couplings are -0.56
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| Release | : 2001 |
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The search for WW and WZ production in p[anti p] collisions at[radical]s= 1.8 TeV using the CDF and D0 detectors is presented. Three analyses, one concentrating on the leptons+ jets decay channels and two concentrating on the dilepton decay channels are described in detail. Limits on anomalous WW[gamma] and WWZ trilinear gauge boson couplings are presented. Prospects for further study of diboson production and anomalous couplings with the Upgraded Tevatron are also presented.
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| Release | : 2017 |
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This Letter presents a search for new physics manifested as anomalous triple gauge boson couplings in WW and WZ diboson production in proton-proton collisions. The search is performed using events containing a W boson that decays leptonically and a W or Z boson whose decay products are merged into a single reconstructed jet. The data, collected at sqrt(s) =8 TeV with the CMS detector at the LHC, correspond to an integrated luminosity of 19 inverse femtobarns. No evidence for anomalous triple gauge couplings is found and the following 95% confidence level limits are set on their values: lambda ([-0.011,0.011]), Delta kappa[gamma] ([-0.044,0.063]), and Delta g[1,Z] ([-0.0087,0.024]). These limits are also translated into their effective field theory equivalents: c[WWW]/ Lambda^2, ([-2.7,2.7] TeV^{-2}), c[B]/ Lambda^2, ([-14,17] TeV^{-2}), and c[W]/ Lambda^2, ([-2.0,5.7] TeV^{-2}).
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| Release | : 2009 |
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This Letter describes the current most precise measurement of the W boson pair production cross section and most sensitive test of anomalous WW[gamma] and WWZ couplings in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The WW candidates are reconstructed from decays containing two charged leptons and two neutrinos, where the charged leptons are either electrons or muons. Using data collected by the CDF II detector from 3.6 fb−1 of integrated luminosity, a total of 654 candidate events are observed with an expected background contribution of 320 ± 47 events. The measured total cross section is [sigma](p{bar p} 2!WW− + X) = 12.1 ± 0.9 (stat){sub -1.4}{sup +1.6} (syst) pb, which is in good agreement with the standard model prediction. The same data sample is used to place constraints on anomalous WW[gamma] and WWZ couplings.
