Muon Anomalous Magnetic Moment and Lepton Flavor Violating Tau Decay in Unparticle Physics

TL;DR

This paper investigates how unparticle physics can explain the muon g-2 anomaly and induce lepton flavor violating tau decays, identifying parameter ranges consistent with experimental constraints.

Contribution

It demonstrates that unparticle interactions can account for muon g-2 discrepancies and predict LFV tau decays within current experimental bounds, depending on the unparticle scaling dimension.

Findings

Unparticle physics can explain muon g-2 anomaly.

LFV tau decay couplings can be sizable without conflict with experiments.

The unparticle scaling dimension d_U > 1.6 is crucial for compatibility.

Abstract

We study effects of unparticle physics on muon g-2 and LFV tau decay processes. LFV interactions between the Standard Model sector and unparticles can explain the difference of experimental value of muon g-2 from the Standard Model prediction. While the same couplings generate LFV tau decay, we found that LFV coupling can be of O(0.1 ... 1) without conflict with experimental bounds of LFV tau decay if the scaling dimension of unparticle operator d_{U} > 1.6.