T. Tait et Cp. Yuan, ANOMALOUS T-C-G COUPLING - THE CONNECTION BETWEEN SINGLE TOP-QUARK PRODUCTION AND TOP-QUARK DECAY, Physical review. D. Particles and fields, 55(11), 1997, pp. 7300-7301
Continuing earlier work, we examine the constraint on an anomalous t-c
-g coupling from top quark decay. We find that from current CDF measur
ements of the branching ratio t --> Wb, the minimum scale at which new
physics can strongly modify the t-c-g coupling is Lambda(tcg) greater
than or equal to about 950 GeV. At the upgraded Fermilab Tevatron, si
ngle top quark production can constrain Lambda(tcg) greater than or eq
ual to 4.5 TeV. The connection between t-c production and the decay t
--> cg is examined, showing how constraints on one lead to a constrain
t on the other.