It was observed recently by Randall and Wise that, any particle in the Standard Model cannot decay to $e^+e^-$ and $gamma gamma$ final states with comparably measurable branching ratios. This is also true for most extensions of the Standard Model, wi
th the Randall-Sundrum model as an outstanding exception. In this paper, we show that two-Higgs-Doublet-Models (2HDM) yield another possible exception if certain parameters are properly chosen. In addition, we have checked that this model survives the tests of low energy processes, including the anomalous magnetic moment and electric dipole moment of leptons, lepton-flavor-violating decays $mu^- to e^- gamma$ and $e^- e^+ e^-$.
An attempt has been made to address the 3sigma anomaly of the forward-backward asymmetry of b quark in LEP data via an unparticle sector. For most part of the parameter space except certain particular regions, the anomaly could not be explained away
plausibly, when constraints from other LEP observables are taken into account.
Fermionic unparticles are introduced and their basic properties are discussed. Some phenomenologies related are exploited, such as their effects on charged Higgs boson decays and anomalous magnetic moments of leptons. Also, it has been found that mea
surements of $B^0-bar B^0$ mixing could yield interesting constraints on couplings between unparticle operators and standard model fields.
