|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|
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.