Abstract
We consider the decay of a heavy top quark into a charged Higgs scalar and a hard photon (gluon)t→H+bγ(g). We give the general result for fermions of arbitrary mass. Our results for the differential decay rate for these two processes are remarkably simple. The radiation amplitude zero (RAZ) factorization is explicit but there is no RAZ for these processes because of the presence of opposite-sign charges. We obtain a branching ratio of 0.063% for bH+γ and 5.6% for bH+g. Thus both decays should be relatively easy to see at the SSC.
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