2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 2, 597-606
DOI 10.1007/s100529800838

Measurement of triple gauge boson couplings from $\mathrm{W^+W^-}$ production at $\sqrt{s}$=172 $\mathrm{GeV}$

The OPAL Collaboration, K.Ackerstaff8 et al.

 8 CERN, European Organisation for Particle Physics, CH-1211 Geneva 23, Switzerland

Received: 16 September 1997 / Published online: 30 March 1998

Abstract
We present measurements of triple gauge boson coupling parameters using data recorded by the OPAL detector at LEP2 at a centre-of-mass energy of 172 $\mathrm{GeV}$.A total of 120W-pair candidates has been selected in the $\mathrm{q\overline{q} }$$\mathrm{q\overline{q} }$, $\mathrm{q\overline{q} }$$\ell\overline{\nu}_{\ell}$ and $\ell\overline{\nu}_{\ell}$$\overline{\ell}^\prime\nu_{\ell^\prime}$ decay channels, for an integrated luminosity of 10.4pb-1. We use these data to determine several different anomalous coupling parameters using the measured cross-section and the distributions of kinematic variables. We measure $\alpha_{B\phi}$=$0.35^{+1.29}_{-1.07}\pm0.38$,$\alpha_{W\phi}$=$0.00^{+0.30}_{-0.28}\pm0.11$,$\alpha_W$ = $0.18^{+0.49}_{-0.47}\pm0.23$,$\Delta g_1^{\mathrm{z}}$=$-0.03^{+0.40}_{-0.37}\pm0.14$,$\Delta \kappa_\gamma^{\tiny(HISZ)}$ = $0.03^{+0.55}_{-0.51}\pm0.20$,and $\Delta \kappa$=$0.03^{+0.49}_{-0.46}\pm0.21$.Combining the $\alpha_{W\phi}$result with our previous result obtained from the 161 $\mathrm{GeV}$ data sample we measure $\alpha_{W\phi}$=$-0.08^{+0.28}_{-0.25}\pm0.10$.All of these measurements are consistent with the Standard Model.


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