Event calendar file
On-shell way to massive amplitudes
by Dr. Wenqi Ke (Theoretical Physics Institute - University of Minnesota)
at IFUNAM ( Sala de Eméritos )
| Description |
As an alternative to Feynman rules, on-shell formalism offers an efficient and elegant way to compute amplitudes with arbitrary number of external particles. The construction relies crucially on an appropriate momentum shift. In the massless case, this formalism is well-established and has proven to be particularly powerful for n-point graviton or gluon amplitudes. However, less is known in the massive case. In this talk, I present a momentum shift in the massive on-shell formalism, which allows to construct amplitudes in QED, electroweak and supergravity theories. This momentum shift is then applied to examples of $e^+e^-$, $W^+W^-$ and gravitino scatterings. https://unam.zoom.us/j/84371291925?pwd=mMHwgWGPXLVvDPzGCaz3XR18mbaqDY.1 Zoom Meeting ID: 843 7129 1925 |
