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

Understand

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