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

TL;DR

This paper uses big bang nucleosynthesis data to set limits on how much unparticle physics could alter gravity's strength over long distances.

Contribution

It introduces new constraints on unparticle-induced deviations from Newtonian gravity based on early universe nucleosynthesis observations.

Findings

Stringent bounds on unparticle effects from BBN data

Limits on unparticle coupling strength to gravity

Implications for unparticle physics models

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.