5 papers
Comment On Nonperturbative O(1/m_c^2) Corrections to B -> X_s gamma
A. K. Grant, A. G. Morgan, S. Nussinov +1
We present an estimate of certain higher order corrections to the contribution of the charm triangle loop in the inclusive B -> X_s gamma decay rate, recently discussed by Voloshin…
Light Gluinos and Jet Production in Collisions
Zvi Bern, Aaron K. Grant, Andrew G. Morgan
The impact of a light, long lived gluino on jet production cross sections in collisions is estimated. The effect is found to be relatively modest, particularly when glui…
Massive Loop Amplitudes from Unitarity
Z. Bern, A. G. Morgan
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 uni…
Second Order Fermions in Gauge Theories
A. G. Morgan
The second order formalism for fermions provides a description of fermions that is very similar to that of scalars. We demonstrate that this second order formalism is equivalent to…
Supersymmetry Relations Between Contributions To One-Loop Gauge Boson Amplitudes
Z. Bern, A. G. Morgan
We apply ideas motivated by string theory to improve the calculational efficiency of one-loop weak interaction processes with massive external gauge bosons. In certain cases ``supe…