Unparticle Physics and A_{FB}^b on the Z pole

TL;DR

This paper investigates whether unparticle physics can explain the 3σ anomaly in the forward-backward asymmetry of b quarks observed at LEP, but finds limited success due to constraints from other measurements.

Contribution

It explores the potential of unparticle sectors to account for the A_FB^b anomaly within LEP data constraints, highlighting the challenges in explaining the anomaly.

Findings

Most parameter space cannot explain the anomaly plausibly.

Certain regions of parameter space may explain the anomaly.

Constraints from other LEP observables limit unparticle explanations.

Abstract

An attempt has been made to address the 3\sigma anomaly of the forward-backward asymmetry of b quark in LEP data via an unparticle sector. For most part of the parameter space except certain particular regions, the anomaly could not be explained away plausibly, when constraints from other LEP observables are taken into account.