Using the proton's quark pressure profile from a GPD fit, the authors update upper bounds on the EiBI gravity parameter kappa to about 0.1 to 0.3 in the quoted units.
Eddington-inspired Born-Infeld gravity: nuclear physics constraints and the validity of the continuous fluid approximation
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abstract
In this paper we investigate the classical non-relativistic limit of the Eddington-inspired Born-Infeld theory of gravity. We show that strong bounds on the value of the only additional parameter of the theory \kappa, with respect to general relativity, may be obtained by requiring that gravity plays a subdominant role compared to electromagnetic interactions inside atomic nuclei. We also discuss the validity of the continuous fluid approximation used in this and other astrophysical and cosmological studies. We argue that although the continuous fluid approximation is expected to be valid in the case of sufficiently smooth density distributions, its use should eventually be validated at a quantum level.
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Eddington-inspired Born-Infeld gravity: Constraints from the generalized parton distributions (GPDs)
Using the proton's quark pressure profile from a GPD fit, the authors update upper bounds on the EiBI gravity parameter kappa to about 0.1 to 0.3 in the quoted units.