Investigation of Trilinear Vector Boson Couplings Through W Boson Pair Production in Dilepton Decay Channels

TL;DRAbstract

An investigation of the interactions between the $W$ boson and the $Z$ boson and photon through the pair production of bosons is presented. This has been accomplished via a study of the reaction $p\overline{p} \to \ell\overline{\nu}_{\ell}$ $\overline{\ell^1}\nu_{\ell^1}$ + X ($\ell, \ell^1 = e, \mu$) at $\sqrt{s}$ + 1.8 TeV, using the D0 detector at Fermilab. In a data sample corresponding to an integrated luminosity of 82 $pb^{-1}$ , four candidate events were observed with an expected background of 2.5 $\pm$ 0.4 events, which is consistent with the Standard Model prediction of 1.5 $\pm$ 0.1 signal events. This results in a 95% confidence level upper limit on the $W$pair production cross section at $\sqrt{s}$ = 1.8 TeV of 44.1 pb. Limits on anomalous $WWZ$ and $WW\gamma$ couplings are obtained for equal and HISZ coupling relations using both the total cross section and a maximum likelihood fit to the lepton transverse momentum distribution. Assuming a form factor scale of 1.5 TeV, th

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