ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. All lowest-order amplitudes for $\mathrm{e^+e^-}\to 4 f \gamma$ are calculated including five anomalous quartic gauge-boson couplings that are allowed by electromagnetic gauge invariance and the custodial $\mathrm{SU}(2)_\mathrm c$ symmetry. Three of these anomalous couplings correspond to the operators $\mathcal{L}_0, \mathcal{L}_{\mathrm c}$ , and $\mathcal{L}_{\mathrm{n}}$ that have been constrained by the LEP collaborations in $\mathrm{WW}\gamma$ production. The anomalous couplings are incorporated in the Monte Carlo generator RacoonWW(RacoonWW fellow of the Deutsche Forschungsgemeinschaft). Moreover, for the processes $\mathrm{e^+e^-}\to 4 f \gamma$ RacoonWW is improved upon including leading universal electroweak corrections such as initial-state radiation. The discussion of numerical results illustrates the size of the leading corrections as well as the impact of the anomalous quartic couplings for LEP2 energies and at 500 GeV.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100520100678
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