Limits on the kappa parameter (k) of the W Boson at the collider detector at Fermilab (CDF)

Recently we obtained bounds on the magnetic moment of theW boson from preliminary results from the collider detector at Fermilab. These results were based on 4.3 pb^–1 of data, from which threeW events and three radiativeW decays were found. Within the next 2 years they expect to have almost 100 pb^–1 of data. In this paper we consider the bounds one will be able to obtain from these data, under two scenarios: (1) The expected Standard Model (SM) results are obtained. (2) The relative number of events observed is the same as in the previous run. We estimate that one will be able to obtain a 95% C.L. bound for k, perhaps as good as –1.9 k 4.2. These bounds would come from the total number of events. When the number of events increases sufficiently, one will be able to obtain an angular distribution forW and an energy distribution for radiativeW decay. Then one could observe the radiation amplitude zero and obtain a precise value for k.