Abstract
A detailed analysis of W pair production in e +e − annihilation at LEP-II energies is presented by using helicity amplitudes for the process e +e −→W +W − with arbitrary WWγ and WWZ couplings. Expressing the complete angular distribution of W decay products in terms of these helicity amplitudes, we perform a systematic search for the most sensitive angular distributions or correlations for anomalous couplings. As a result precise tests of the gauge-theory cancellations between different diagrams are suggested. Angular distributions sensitive to W +W − rescattering effects and/or CP-violating vector boson couplings are studied as well. Complete helicity amplitudes for the process e + e − → W + W − → ( q 1 q 2 g)( q 3 q 4 g) with arbitrary quark masses and finite W width are presented in a form convenient for their direct numerical evaluation. Amplitudes for the processes e +e − → ZZ and Z γ are also included.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
