Old and New No Go Theorems on Interacting Massless Particles in Flat
Space [PDF]
M. PorratiWe review model independent arguments showing that massless particles interacting with gravity in a Minkowski background space can have at most spin two. These arguments include a classic theorem due to Weinberg, as well as a more recent extension of the Weinberg-Witten theorem. A puzzle arising from an apparent counterexample to these theorems is examined and resolved.View original: http://arxiv.org/abs/1209.4876
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