Long range forces and limits on unparticle interactions

TL;DR

This paper discusses how unparticle interactions can produce long-range forces that are tightly constrained by tests of gravity, surpassing collider and astrophysical limits.

Contribution

It highlights the strength of gravitational inverse square law tests in constraining unparticle couplings to standard model particles.

Findings

Long-range forces from unparticles are strongly limited by gravity tests.

Constraints on unparticle couplings exceed collider and astrophysical bounds.

Couplings to baryon or lepton number are particularly restricted.

Abstract

Couplings between standard model particles and unparticles from a nontrivial scale invariant sector can lead to long range forces. If the forces couple to quantities such as baryon or lepton (electron) number, stringent limits result from tests of the gravitational inverse square law. These limits are much stronger than from collider phenomenology and astrophysics.