CONSTRAINTS ON ANOMALOUS WW-GAMMA AND WW-PI-PI COUPLINGS AT A 500-GEV LINEAR E+E- COLLIDER

We examine the potential of a future 500 GeV linear e+ e- collider (NLC) to probe the "minimal" set (kappa(gamma), lambda(gamma)) of anomalous WW-gamma and WW-gamma-gamma couplings via the (sub) processes-gamma-gamma W+ W-, e-gamma --> W-nu and e+ e- --> W+ W-, for comparison. Photon beams both from classical Bremsstrahlung and, notably, from backscattering laser light off e +/- beams are considered. The differential cross sections d-sigma/d cos theta of the three reactions are calculated analytically, and used as observables in a chi-2 analysis under identical assumptions on machine parameters. The constraints emerging from the use of laser photon beams appear very encouraging, are independent of kappa(Z) and lambda(Z) and impressively underline the importance of realizing laser photon beams at the NLC.