| Speaker: | Xiaochuan Lu (University of California, San Diego) |
|---|---|
| Title: | Geometric Pictures of the Amplitudes |
| Date (JST): | Wed, Apr 05, 2023, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: | The Lagrangian formulation of quantum field theories has field parameterization redundancies --- generic field redefinitions will change the Lagrangian but leave physical amplitudes invariant. This naturally fits into a geometric picture, where different field parameterizations are different choices of coordinates on the field space manifold, while the amplitudes are geometric invariants. In this talk, I will review the well-established field space geometry picture for amplitudes, as well as a number of its applications. I will then introduce a generalization of it to accommodate field redefinitions with derivatives. |
