Kj. Abraham et al., SEARCHING FOR AN ANOMALOUS (T)OVER-BAR-Q-GAMMA COUPLING VIA SINGLE TOP-QUARK PRODUCTION AT A GAMMA-GAMMA COLLIDER, Physics letters. Section B, 419(1-4), 1998, pp. 381-386
We investigate the potential of a high-energy gamma gamma collider to
detect an anomalous <(t)over bar q gamma> coupling from observation of
the reaction gamma gamma --> <t(q)over bar>, <(t)over bar q>, where q
= c or u. We find that with b-tagging and suitable kinematic cuts thi
s process should be observable if the anomalous coupling kappa/Lambda
is no less than about 0.05/TeV, where Lambda is the scale of new physi
cs associated with the anomalous interaction. This improves upon the b
ound possible from observation of top decays at the Tevatron. (C) 1998
Published by Elsevier Science B.V.