Alladi Ramakrishnan Hall

Scattering amplitudes and BCFW in N = 2* Theory

Md Abhishek

HRI

We use massive spinor helicity formalism to study scattering
amplitudes in N = 2* super-Yang-Mills theory in four dimensions. We compute
the amplitudes at an arbitrary point in the Coulomb branch of this theory.
We compute amplitudes using projection from N = 4 theory and write
three-point amplitudes in a convenient form using special kinematics. We
then compute four-point amplitudes by carrying out massive BCFW shifts of
the amplitudes. We find some of the shifted amplitudes have a pole at z =
∞. Taking the residue at z = ∞ into account ensures little group covariance
of the final result.