Muon (g-2) from the bulk neutrino field in a warped extra dimensional model

TL;DR

This paper investigates how a bulk neutrino field in a warped extra-dimensional model can account for the muon's anomalous magnetic moment discrepancy, providing a potential new physics explanation.

Contribution

It calculates the bulk neutrino contribution to (g-2)_μ in a Randall-Sundrum model, showing it can explain the experimental discrepancy and exploring related parameter constraints.

Findings

Bulk neutrino contribution has the correct sign to explain (g-2)_μ discrepancy.

Model parameters are constrained by contributions from bulk gravitons.

The calculation is performed in the 't Hooft-Feynman gauge.

Abstract

In the Randall-Sundrum model, a bulk neutrino field in the 5-dimensional space-time can give rise to tiny Dirac masses to neutrinos. In such a scenario, we have computed the contribution of the bulk neutrino field to the anomalous magnetic moment $(g-2)_\mu$ of muon. We have computed this contribution in the 't Hooft-Feynman gauge and have found that the contribution has the right sign to fit the current discrepancy between the experiment and the standard model value of $(g-2)_\mu$. We have also studied possible constraints on the model parameters by including contributions to $(g-2)_\mu$ from other sources such as bulk gravitons.