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Multi-particle Representations of the Poincaré Group
Csaba Csáki, Sungwoo Hong, Yuri Shirman +2
In this work we extend the definition of asymptotic multi-particle states of the -matrix, beyond the direct products of one-particle states. We identify new quantum numbers whic…
Scattering Amplitudes for Monopoles: Pairwise Little Group and Pairwise Helicity
Csaba Csaki, Sungwoo Hong, Yuri Shirman +3
On-shell methods are particularly suited for exploring the scattering of electrically and magnetically charged objects, for which there is no local and Lorentz invariant Lagrangian…
The Axion Mass from 5D Small Instantons
Tony Gherghetta, Valentin V. Khoze, Alex Pomarol +1
We calculate a new contribution to the axion mass that arises from gluons propagating in a 5th dimension at high energies. By uplifting the 4D instanton solution to five dimensions…