Helicity Amplitudes for massive gravitinos in N=1 Supergravity

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 -> γG, as well as the cross sections for e^+ e- -> GG.

9 pages, 2 figures

References in corpus (8)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• New Relations for Gauge-Theory Amplitudes
• The All-Loop Integrand For Scattering Amplitudes in Planar N=4 SYM
• On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios
• String Resonances at Hadron Colliders
• SpinorsExtras - Mathematica implementation of massive spinor-helicity formalism
• Weyl spinors and the helicity formalism
• Stop Decay with LSP Gravitino in the final state: ${\tilde{t}}_1\to \tilde{G}Wb$

Cited by in corpus (3)

• Probing some photon portals to new physics at intensity frontier experiments
• Gapped gravitinos, isospin $\frac{1}{2}$ particles and $\mathcal{N}=2$ partial breaking
• Helicity Amplitudes for production of massive gravitino/goldstino