ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. The triple gauge-boson couplings involving the W are determined using data samples collected with the ALEPH detector at mean centre-of-mass energies of 183 GeV and 189 GeV, corresponding to integrated luminosities of 57 pb $^{-1}$ and 174 pb $^{-1}$ , respectively. The couplings, $g^Z_1$ , $\kappa_\gamma$ and $\lambda_\gamma$ , are measured using W-pair events, single-{\it W} production and single- $\gamma$ production. Each coupling is measured individually with the other two couplings fixed at their standard model value. Including ALEPH results from lower energies, the 95% confidence level intervals for the deviation to the standard model are $-0.087 〈\Delta{g}^{Z}_1 〈 0.141$ , $-0.200 〈 \Delta\kappa_\gamma 〈 0.258$ , and $-0.062 〈 \lambda_\gamma 〈 0.147$ . Fits are also presented where two or all three couplings are allowed to vary. In addition, W-pair events are used to set limits on the C- or P-violating couplings $g^V_4$ , $g^V_5$ , ${\tilde{\kappa}_{V}}$ , and ${\tilde{\lambda}_{V}}$ , where V denotes either $\gamma$ or Z. No deviations from the standard model expectations are observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100520100730
