Studies of gauge boson pair production and trilinear couplings

Le résumé fourni par la source

The gauge boson pair production processes $W\ensuremath{\gamma}$, $\mathrm{WW}$, $\mathrm{WZ}$, and $Z\ensuremath{\gamma}$ were studied using $p\overline{p}$ collisions corresponding to an integrated luminosity of approximately $14 {\mathrm{pb}}^{\ensuremath{-}1}$ at a center-of-mass energy of $\sqrt{s}=1.8$ TeV. Analysis of $W\ensuremath{\gamma}$ production with subsequent $W$ boson decay to $\mathcal{l}\ensuremath{\nu}$ $(\mathcal{l}=e,\ensuremath{\mu})$ is reported, including a fit to the ${p}_{T}$ spectrum of the photons which leads to limits on anomalous $\mathrm{WW}\ensuremath{\gamma}$ couplings. A search for $\mathrm{WW}$ production with subsequent decay to $\mathcal{l}\mathcal{l}\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ $(\mathcal{l}=e,\ensuremath{\mu})$ is presented, leading to an upper limit on the $\mathrm{WW}$ production cross section and limits on anomalous $\mathrm{WW}\ensuremath{\gamma}$ and $\mathrm{WWZ}$ couplings. A search for high ${p}_{T}$ $W$ bosons in $\mathrm{WW}$ and $\mathrm{WZ}$ production is described, where one $W$ boson decays to an electron and a neutrino and the second $W$ boson or the $Z$ boson decays to two jets. A maximum likelihood fit to the ${p}_{T}$ spectrum of $W$ bosons resulted in limits on anomalous $\mathrm{WW}\ensuremath{\gamma}$ and $\mathrm{WWZ}$ couplings. A combined fit to the three data sets which provided the tightest limits on anomalous $\mathrm{WW}\ensuremath{\gamma}$ and $\mathrm{WWZ}$ couplings is also described. Limits on anomalous $\mathrm{ZZ}\ensuremath{\gamma}$ and $Z\ensuremath{\gamma}\ensuremath{\gamma}$ couplings are presented from an analysis of the photon ${E}_{T}$ spectrum in $Z\ensuremath{\gamma}$ events in the decay channels $(ee, \ensuremath{\mu}\ensuremath{\mu}, \mathrm{and}\ensuremath{\nu}\ensuremath{\nu})$ of the $Z$ boson.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.