We consider the lepton-flavor violating (LFV) processes li → ljγ in the framework of topcolor-assistedtechnicolor (TC2) models. We find that the new gauge boson Z' predicted by TC2 models can give significantlyc...We consider the lepton-flavor violating (LFV) processes li → ljγ in the framework of topcolor-assistedtechnicolor (TC2) models. We find that the new gauge boson Z' predicted by TC2 models can give significantlycontributions to these processes via the flavor-changing couplings Z'lilj. The present experimental bound on the LFVprocess μ→ eγ gives severe constraints on the TC2 models. Using other experimental constraints on the Z' mass Mz,we obtain constraints on the lepton mixing factors KTμ and KTe. The future LFV experiments will probe into TC2models.展开更多
We investigate the associated production of the neutral top-Higgs ht^0 with a pair of top-quarks in the context of the topcolor-assisted technicolor （TC2） model at the future e＋e- Linear Colliders （LC） i.e. e＋e-...We investigate the associated production of the neutral top-Higgs ht^0 with a pair of top-quarks in the context of the topcolor-assisted technicolor （TC2） model at the future e＋e- Linear Colliders （LC） i.e. e＋e- → ttht^0. We calculate the production rate and present the distributions of the transverse momenta of top-Higgs and top-quarks. The results show that the total cross section is typically of the order of 1.0 7.5 fb in the energy range between 1000 GeV and 2000 GeV of the LC for the whole top-Higgs mass region of interest. It should be distinctly possible that hundreds or even thousands of ht^0 signals can be produced per year at the LC given the luminosity L = 500 fb^-1.展开更多
文摘We consider the lepton-flavor violating (LFV) processes li → ljγ in the framework of topcolor-assistedtechnicolor (TC2) models. We find that the new gauge boson Z' predicted by TC2 models can give significantlycontributions to these processes via the flavor-changing couplings Z'lilj. The present experimental bound on the LFVprocess μ→ eγ gives severe constraints on the TC2 models. Using other experimental constraints on the Z' mass Mz,we obtain constraints on the lepton mixing factors KTμ and KTe. The future LFV experiments will probe into TC2models.
基金Supported by National Natural Science Foundation of China (10775039)Specialized Research Fund for Doctoral Program ofHigher Education (20094104110001)Programme for Youths’ Talents of Xinyang Normal University (200950)
文摘We investigate the associated production of the neutral top-Higgs ht^0 with a pair of top-quarks in the context of the topcolor-assisted technicolor （TC2） model at the future e＋e- Linear Colliders （LC） i.e. e＋e- → ttht^0. We calculate the production rate and present the distributions of the transverse momenta of top-Higgs and top-quarks. The results show that the total cross section is typically of the order of 1.0 7.5 fb in the energy range between 1000 GeV and 2000 GeV of the LC for the whole top-Higgs mass region of interest. It should be distinctly possible that hundreds or even thousands of ht^0 signals can be produced per year at the LC given the luminosity L = 500 fb^-1.
