Gravitational constant in multiple field gravity

Abstract

In the present study, we consider general form of the Lagrangian $f(R,{\varphi }^I,X)$, that is a function of the Ricci scalar, multiple scalar fields and non-canonical kinetic terms. We obtain the effective Newton's constant deep inside the Hubble radius. We use Jordan and Einstein frames, and study the conservation of energy-momentum tensor.

13 pages,no fig., JCAP style

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