Massive Loop Amplitudes from Unitarity

Details Massive Loop Amplitudes from Unitarity Massive Loop Amplitudes from Unitarity

1995-11-16

arxiv.org/abs/hep-ph/9511336v2

Nucl.Phys.B467:479-509,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

Minor modifications, 27 pages including two figures

Scientific paper

10.1016/0550-3213(96)00078-8

We show, for previously uncalculated examples containing a uniform mass in the loop, that it is possible to obtain complete massive one-loop gauge theory amplitudes solely from unitarity and known ultraviolet or infrared mass singularities. In particular, we calculate four-gluon scattering via massive quark loops in QCD. The contribution of a heavy quark to five-gluon scattering with identical helicities is also presented.

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