ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Massimo Porrati (New York U)
Title: Strong Coupling and Causality in High-Spin Massive Particles: the Charged Spin 3/2 Example
Date (JST): Wed, Aug 04, 2010, 13:30 - 14:30
Place: Seminar Room A
Related File: 309.pdf
Abstract: We briefly review, in the context of charged spin 3/2 particles, a general argument outlining the presence of an intrinsic unitarization scale for interacting high-spin massive particles.
We also present a recently discovered non-minimal action for charged spin 3/2 particles, which propagates causally physical degrees only --in constant external electromagnetic backgrounds. This action thus solves the long-standing puzzle due to the famous Velo-Zwanziger acausality problem.