Predictive Power of Strong Coupling in Theories with Large Distance Modified Gravity

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dc.creatorDvali, Gia
dc.date2006-10-01
dc.date.accessioned2026-07-07T10:26:05Z
dc.date.available2026-07-07T10:26:05Z
dc.descriptionWe consider theories that modify gravity at cosmological distances, and show that any such theory must exhibit a strong coupling phenomenon, or else it is either inconsistent or is already ruled out by the solar system observations. We show that all the ghost-free theories that modify dynamics of spin-2 graviton on asymptotically flat backgrounds, automatically have this property. Due to the strong coupling effect, modification of the gravitational force is source-dependent, and for lighter sources sets in at shorter distances. This universal feature makes modified gravity theories predictive and potentially testable not only by cosmological observations, but also by precision gravitational measurements at scales much shorter than the current cosmological horizon. We give a simple parametrization of consistent large distance modified gravity theories and their predicted deviations from the Einsteinian metric near the gravitating sources.
dc.description12 pages, Latex, to be published in New Journal of Physics
dc.identifierhttps://arxiv.org/abs/hep-th/0610013
dc.identifierhttp://arxiv.org/abs/hep-th/0610013
dc.identifierNewJ.Phys.8:326,2006
dc.identifierdoi:10.1088/1367-2630/8/12/326
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176759
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePredictive Power of Strong Coupling in Theories with Large Distance Modified Gravity
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