Radiative Dileptonic Decays B_(s)→l^(+)l^(-)γ in the TC2 Model

We investigate the radiative dileptonic decays B_(s)→l^(+)l^(-)γ (l =e,μ and T) in the framework of the topcolor-assisted technicolor (TC2) model.he contributions of the new particles predicted by this model to the branching ratios and the forward-backward asymmetry (AFB) of these decays are considered.It is found that the values of their branching ratios are greater than the standard model (SM) predictions by several times up to one order of magnitude and │AFB│ can also be enhanced by several times in a wide range of the parameter space.

Neutrino-Electron Scattering and the Little Higgs Models

The neutrino-electron scattering process is sensitive to the standard model(SM)and the new physics beyond the SM.We calculate the corrections of the littlest Higgs model and the SU(3)simple group model to theνe e scattering cross section.Using the LSND experimental measured values,we obtain the bounds on the relevant free parameters,which might be compatible with those from the electroweak precision data.

Anomalous Wtb Couplings and b→sγin the Topcolor Assisted Technicolor Models

Using the topcolor-assisted technicolor models,we give the anomalous Wtb couplings arising from the exchange of the new gauge bosons(ETC gauge boson,colorons and Z')and calculate their contributions to the b→sγbranching ratio.We find that the contributions mainly come from colorons and the recent measured value of the b→sγbranching ratio gives a strong constraint on the masses of colorons.

Extended Technicolor Dynamics and Single Top Quark Production at the Fermilab Tevatron

The large electron positron collider value of branching ratio Rb is larger than the standard model predicted value RSMb,this deviationδRb is treated as an allowed range for the correction to the single top quark production cross sectionσ(tb)arising from the extended technicolor dynamics.It is found that the relative correctionδσ(tb)/σ0(tb)is quite large for a certain range of the free parameters in the model,and may be detected in the future proton-antiproton collision experiments.