Constraints on unparticle long range forces from big bang nucleosynthesis bounds on the variation of the gravitational coupling

Abstract

We use big bang nucleosynthesis bounds on the variation of the gravitational coupling to derive constraints on the strength of the deviation from the gravitational inverse-square law due to tensor and vector unparticle exchange.

Comments: 4 pages, 3 figures, change in the title and other minor changes to match version published in Physical Review D