Beyond Amplitudes' Positivity and the Fate of Massive Gravity

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dc.contributor.areaPhysicsen_US
dc.contributor.authorBellazzini, Brando
dc.contributor.authorRiva, Francesco
dc.contributor.authorSerra, Javi
dc.contributor.authorSgarlata, Francesco
dc.date.accessioned2017-10-09T12:53:09Z
dc.date.available2017-10-09T12:53:09Z
dc.date.issued2017
dc.description.abstractWe constrain effective feld theories by going beyond the familiar positivity bounds that follow from unitarity, analyticity, and crossing symmetry of the scattering amplitudes. As interesting examples, we discuss the implications of the bounds for the Galileon and ghost-free massive gravity. The latter is ruled out by our theoretical bounds when combined with the experimental constraints on the graviton mass and from fifth-force experiments, given the impossibility to consistently implement the Vainshtein mechanism. We also show that the Galileon theory must contain symmetry-breaking terms that are at most one-loop suppressed compared to the symmetry-preserving ones.en_US
dc.identifier.urihttps://openscience.sissa.it/handle/1963/35297
dc.language.isoenen_US
dc.relation.firstpage1en_US
dc.relation.ispartofseriesSISSA;46/2017/FISI
dc.relation.ispartofseriesCERN;TH-2017-201
dc.relation.lastpage11en_US
dc.titleBeyond Amplitudes' Positivity and the Fate of Massive Gravityen_US
dc.typePreprinten_US
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