Leptophilic U(1) massive vector bosons from large extra dimensions

Luis A Anchordoqui,Ignatios Antoniadis,Xing Huang,Dieter Lüst,Tomasz R Taylor

doi:10.1016/j.physletb.2021.136585

Abstract

We demonstrate that the discrepancy between the anomalous magnetic moment measured at BNL and Fermilab and the Standard Model prediction could be explained within the context of low-scale gravity and large extra-dimensions. The dominant contribution to (g−2)μ originates in Kaluza-Klein (KK) excitations (of the lepton gauge boson) which do not mix with quarks (to lowest order) and therefore can be quite light avoiding LHC constraints. We show that the KK contribution to (g−2)μ is universal with the string scale entering as an effective cutoff. The KK tower provides a unequivocal distinctive signal which will be within reach of the future muon smasher.

Highlights

We demonstrate that the discrepancy between the anomalous magnetic moment measured at BNL and Fermilab and the Standard Model prediction could be explained within the context of low-scale gravity and large extra-dimensions
Low scale gravity and large extra dimensions offer a genuine solution to the gauge hierarchy problem [1, 2]
TeV-scale D-brane string compactifications could provide an innovative framework to explain the extant tension between the Standard Model (SM) prediction of aμ and experiment

Summary

Introduction

Low scale gravity and large extra dimensions offer a genuine solution to the gauge hierarchy problem [1, 2]. We demonstrate that the discrepancy between the anomalous magnetic moment measured at BNL and Fermilab and the Standard Model prediction could be explained within the context of low-scale gravity and large extra-dimensions.

Results

Conclusion