Helicity Formalism for Spin-2 Particles

Abstract

We develop the helicity formalism for spin-2 particles and apply it to the case of gravity in flat extra dimensions. We then implement the large extra dimensions scenario of Arkani-Hamed, Dimopoulos and Dvali in the program AMEGIC++, allowing for an easy calculation of arbitrary processes involving the emission or exchange of gravitons. We complete the set of Feynman rules derived by Han, Lykken and Zhang, and perform several consistency checks of our implementation.

22 pages, 10 figures, uses JHEP3.cls and axodraw. Some minor clarifications in the text, version to appear in JHEP

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