Abstract
We describe an explicitN=2 supergravity model where an arbitrarily light vector boson (“graviphoton”) is coupled, with typical gravitational strength to matter hypermultiplets, possessing unbroken gauge interactions as well. We discuss: i) the mass and the couplings of the graviphoton; ii) the consistency of its coupling to a mass generated by the Higgs mechanism; iii) the actual composition of the graviphoton in terms of the original vector fields of the Lagrangian (e.g. its mixing with the photon).
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Barbieri, R., Cecotti, S. A model for a light graviphoton. Z. Phys. C - Particles and Fields 33, 255–261 (1986). https://doi.org/10.1007/BF01411143
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DOI: https://doi.org/10.1007/BF01411143