The Maximal Mass Model and Lepton Magnetic Moment

TL;DR

This paper explores a modified quantum electrodynamics model incorporating a maximal mass, predicting a different lepton magnetic moment behavior, notably a negative deviation for the tau lepton, which aligns qualitatively with experimental limits.

Contribution

It introduces a two-component formulation of quantum electrodynamics with a maximal mass, predicting a negative deviation in lepton magnetic moments that increases with lepton mass, differing from standard models.

Findings

Predicts a decreasing g-factor with increasing lepton mass

Suggests the tau lepton's magnetic moment deviation is negative

Aligns qualitatively with experimental bounds on tau magnetic moment

Abstract

The two-component formulation of quantum electrodynamics with fundamental mass is studied. We review and update the prediction of the primordial existence of lepton magnetic moment in framework of two component formulation of the Maximal Mass Model containing a limiting mass $M$, which is considered as new universal physical constant. As it well known in the Dirac theory so-called gyromagnetic factor $g=2$. Quantum electrodynamics together with electro-weak theory and hadronic contributions predicts deviations from Dirac's value. It is very important that all these effects \textbf{slightly increase the $g$-value}. But in our model we have any decreasing of this quantity $g=2\sqrt{1-m^2/M^2}$, where $m$ - is a lepton mass. The most intriguing prediction of new approach is the absolute value of this deviation increases with growth of a lepton mass. In this connection the direct experimental measurements of $\tau$ - lepton anomalous magnetic moment $a_\tau = (g - 2)/2$ gain in extraordinary importance. The most stringent limit $-0.052 < a_{\tau} < 0.013$ at 95% confidence level, was set by the {\small DELPHI}\cite{delphi} collaboration. The authors also quote their result in the form of central value and error $ a_\tau = - 0.018(17).$ To pay attention that the sign of $a_\tau$ is the negative and now we can speak about a qualitative agreement with our predictions.