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arXiv · 1612.04331

Helicity Amplitudes for massive gravitinos in N=1 Supergravity

J. Lorenzo Diaz-Cruz·Bryan O. Larios
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Abstract

We develop the formal tools needed to construct helicity amplitudes for massive gravitino in N=1 SUGRA. We start by considering the helicity states for massive spin-3/2 particles, which involves the solutions of Rarita-Schwinger equation. These solutions are written in terms of the helicity bra-ket notation and are used then to derive the interactions of gravitino with matter and gauge supermultiplets within N=1 Supergravity. The corresponding interactions of goldstinos are discussed too, relying on the goldstino-gravitino equivalence theorem. Finally to appreciate the power of our methods we evaluate the decay width chi_0 -> \gamma G, as well as the cross sections for e^+ e- -> GG.

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J. Lorenzo Diaz-Cruz, Bryan O. Larios. 2016-12-13. Helicity Amplitudes for massive gravitinos in N=1 Supergravity. https://doi.org/10.1088/1361-6471/aa9359

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