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...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.展开更多
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 sca...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.展开更多
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→sγb...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.展开更多
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 prod...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.展开更多
基金Supported in part by the National Natural Science Foundation of China under Grant No 10975067the Natural Science Foun-dation of the Liaoning Scientific Committee(No 201102114)Foundation of Liaoning Educational Committee(No LT2011015).
文摘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.
基金Supported in part by the National Natural Science Foundation of China under Grants No.10975067the Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP)(No.200801650002).
文摘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.
基金Supported by the National Natural Science Foundation of China under Grant No.19905004the Excellent Youth Foundation of Henan Scientific Commit tee and Foundation of Henan Educational Commit tee.
文摘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.
基金Supported by the National Natural Science Foundation of China under Grant No.19775012the Natural Foundation of He7nan Scientific Committee。
文摘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.
基金The project supported by National Natural Science Foundation of China, the Excellent Youth Foundation of Henan Scientific Committee and Foundation of Henan Educational Committee