Lepton flavor violating $l_i\to l_j \gamma\gamma$ decays induced by scalar unparticle

TL;DR

This paper investigates lepton flavor violating decays involving two photons mediated by scalar unparticles, constraining model parameters with experimental data and predicting branching ratios for related processes.

Contribution

It introduces a novel analysis of l_i -> l_j gamma gamma decays via scalar unparticles, providing constraints on unparticle parameters and predictions for other decay modes.

Findings

Constraints on unparticle scaling dimension and couplings from experimental limits.

Predicted branching ratios for other radiative lepton decays.

Potential to test unparticle physics through future decay measurements.

Abstract

We study the radiative lepton flavor violating l_i -> l_j \gamma\gamma decays in the case that the lepton flavor violation is induced by the scalar unparticle mediation. We restrict the scaling dimension d_u and the scalar unparticle-photon-photon coupling by using the experimental upper limit of the branching ratio of the decay \mu -> e \gamma\gamma. Furthermore, we predict the BRs of the other radiative decays by using the restrictions we get. We observe that the measurements of upper limits of BRs of these decays ensure considerable information for testing the possible signals coming from unparticle physics