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Multi-graviton theories: Yes-go and no-go results

par Boulanger, Nicolas
Référence Fortschritte der Physik, 50, 8-9, page (858-863)
Publication Publié, 2002

Article révisé par les pairs

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Résumé :

We report yes-go and no-go results on consistent cross-couplings for a collection of gravitons. Motivated by the search of theories where multiplets of massless spin-two fields cross-interact, we look for all the consistent deformations of a positive sum of Pauli-Fierz actions. We also investigate the problem of deforming a (positive and negative) sum of linearized Weyl gravity actions and show explicitly that there exists multi-Weyl-graviton theories. As the single-graviton Weyl theory, these theories do not have an energy bounded from below.