Confronting the inverse seesaw mechanism with the recent muon g-2 result

TL;DR

This paper examines whether the inverse seesaw mechanism can explain the recent muon g-2 anomaly, considering constraints from non-unitary leptonic mixing in standard and 3-3-1 models.

Contribution

It analyzes the impact of non-unitary constraints on the inverse seesaw's ability to account for the muon g-2 anomaly within different theoretical frameworks.

Findings

In the standard model implementation, the mechanism cannot explain muon g-2 due to constraints.

In 3-3-1 models, similar restrictions prevent explaining the anomaly.

Constraints severely limit the parameter space for the inverse seesaw to be viable.

Abstract

Since the heavy neutrinos of the inverse seesaw mechanism mix largely with the standard ones, the charged currents formed with them and the muons have the potential of generating robust and positive contribution to the anomalous magnetic moment of the muon. Ho\-we\-ver, bounds from the non-unitary in the leptonic mixing matrix may restrict so severely the parameters of the mechanism that, depending on the framework under which the mechanism is implemented, may render it unable to explain the recent muon g-2 result. In this paper we show that this happens when we implement the mechanism into the standard model and into two versions of the 3-3-1 models.