Astro Unparticle Physics

TL;DR

This paper examines how flavor-blind, CP-conserving unparticle operators influence various physical phenomena, revealing that astrophysical observations impose the strongest constraints, especially depending on the unparticle operator dimension.

Contribution

It provides a comprehensive comparison of astrophysical and collider bounds on unparticle interactions, emphasizing the dependence on the unparticle dimension d_U.

Findings

Astrophysical bounds are generally stronger than collider bounds.

Bounds vary significantly with the unparticle dimension d_U.

Stellar cooling provides the most restrictive bounds for d_U=2.

Abstract

We investigate the effects of all flavor blind CP-conserving unparticle operators on 5th force experiments, stellar cooling, supernova explosions and compare the limits with each other and with those obtainable from collider experiments. In general, astrophysical bounds are considerably stronger, however they depend strongly on the dimension d_U of the unparticle operator. While for d_U=1, 5th force experiments yield exceedingly strong bounds, the bounds from stellar and supernova cooling are more comparable for d_U=2, with stellar cooling being most restrictive. Bounds on vectorial unparticle couplings are generally stronger than those on scalar ones.