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
Applying perturbative QCD, we study the process Bc → Dsγ in the technicolor with a massless scalar doublet model (TCMLSM). There are mainly two mechanisms contributing to the Bc → D*sγ process. One proceeds throug...Applying perturbative QCD, we study the process Bc → Dsγ in the technicolor with a massless scalar doublet model (TCMLSM). There are mainly two mechanisms contributing to the Bc → D*sγ process. One proceeds through the short distance b → sγ transition and the other through weak annihilation accompanied by a photon emission.We find that, compared with the standard model, the modification of Bc → D*sγ from πρ (the physical pions in the TCMLSM) is so small that can be neglected for the allowed mass ofπρ. The weak-annihilation contribution is found to be about one order larger than that of the electromagnetic penguin diagrams.展开更多
Bosonic part of SU(2)L U(1)Y effective chiral Lagrangian for electroweak symmetry breaking is derived from an underlying technicolor theory with no approximation. The underlying theory is assumed to be the most genera...Bosonic part of SU(2)L U(1)Y effective chiral Lagrangian for electroweak symmetry breaking is derived from an underlying technicolor theory with no approximation. The underlying theory is assumed to be the most general gauge theory without fundamental scalars. A condensate is required to exist in the theory which breaks SU(2)L U(1)Y dynamically to U(1)em and the anomaly of the theory caused by gauge interaction must be cancelled. The formulation offers general definitions in terms of underlying theory for the low energy constants in effective chiral Lagrangian.展开更多
ICTC2011期间，中国有线网络双向接入产业联盟（BiCA，Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3．0迈进。BiCA联盟核心成员Technicolor特艺集团表示，在三网融合不断深入的背景下，Technicolor特...ICTC2011期间，中国有线网络双向接入产业联盟（BiCA，Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3．0迈进。BiCA联盟核心成员Technicolor特艺集团表示，在三网融合不断深入的背景下，Technicolor特艺集团将继续带动BiCA联盟进行技术升级，推动技术标准统一，加强产品互联互通。展开更多
2011年10月18-21日,在西安举行的ICTC2011会议期间,中国有线网络双向接入产业联盟（BiCA,Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3.0迈进。BiCA联盟核心成员Technicolor特艺集团表示,在三网融合...2011年10月18-21日,在西安举行的ICTC2011会议期间,中国有线网络双向接入产业联盟（BiCA,Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3.0迈进。BiCA联盟核心成员Technicolor特艺集团表示,在三网融合不断深入的背景下,Technicolor特艺集团将继续带动BiCA联盟进行技术升级,推动技术标准统一,加强产品互联互通。展开更多
In the framework of topcolor-assisted technicolor model we calculate the contributions from thc pseudoGoldstone bosons and new gauge bosons to e+e- → tt. We find that for reasonable ranges of the parameters, thepseud...In the framework of topcolor-assisted technicolor model we calculate the contributions from thc pseudoGoldstone bosons and new gauge bosons to e+e- → tt. We find that for reasonable ranges of the parameters, thepseudo Goldstone bosons afford dominate contribution, the correction arising from new gauge bosons is negligibly small,the maximum of the relative corrections is ～ 10% with the center-of-mass energy s ＝ 500 GeV; whereas in the cascof s ＝ 1500 GeV, the relative corrections could be up to 16%. Thus large new physics might be observablc at theexperiments of next-generation linear colliders.展开更多
In this paper, we study the single neutral top-higgs (h0t) production processes at the CERN Large Hadron Collider (LHC) and the International Linear Collider (ILC). At the LHC, the production rates of processes pp→Z(...In this paper, we study the single neutral top-higgs (h0t) production processes at the CERN Large Hadron Collider (LHC) and the International Linear Collider (ILC). At the LHC, the production rates of processes pp→Z(W)h0t are too small to detect h0t . However, with the reasonable parameter values, the cross sections can reach the level of 102 fb for qq→qqh0t process and 103 fb for top quark associated production process pp→th0t+X, respectively. At the ILC, we study the single top-higgs production processes e-γ→νeW-h0t and γγ→W+W-h0t in e-γ and γγ collisions. It is found that the production cross sections can reach the level of a few fb with reasonable parameter values. Furthermore, such processes with the flavor-changing decay mode h0t→tc might provide typical signatures to detected the top-higgs. Therefore, it is hopeful to find the signal of top-higgs at the LHC and ILC experiments via theses processes and test the TC2 model directly.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.
文摘Applying perturbative QCD, we study the process Bc → Dsγ in the technicolor with a massless scalar doublet model (TCMLSM). There are mainly two mechanisms contributing to the Bc → D*sγ process. One proceeds through the short distance b → sγ transition and the other through weak annihilation accompanied by a photon emission.We find that, compared with the standard model, the modification of Bc → D*sγ from πρ (the physical pions in the TCMLSM) is so small that can be neglected for the allowed mass ofπρ. The weak-annihilation contribution is found to be about one order larger than that of the electromagnetic penguin diagrams.
文摘Bosonic part of SU(2)L U(1)Y effective chiral Lagrangian for electroweak symmetry breaking is derived from an underlying technicolor theory with no approximation. The underlying theory is assumed to be the most general gauge theory without fundamental scalars. A condensate is required to exist in the theory which breaks SU(2)L U(1)Y dynamically to U(1)em and the anomaly of the theory caused by gauge interaction must be cancelled. The formulation offers general definitions in terms of underlying theory for the low energy constants in effective chiral Lagrangian.
文摘ICTC2011期间，中国有线网络双向接入产业联盟（BiCA，Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3．0迈进。BiCA联盟核心成员Technicolor特艺集团表示，在三网融合不断深入的背景下，Technicolor特艺集团将继续带动BiCA联盟进行技术升级，推动技术标准统一，加强产品互联互通。
文摘2011年10月18-21日,在西安举行的ICTC2011会议期间,中国有线网络双向接入产业联盟（BiCA,Broadband and Interactive Cable Alliance）宣布将推动WiFi降频技术标准向BiCA3.0迈进。BiCA联盟核心成员Technicolor特艺集团表示,在三网融合不断深入的背景下,Technicolor特艺集团将继续带动BiCA联盟进行技术升级,推动技术标准统一,加强产品互联互通。
文摘In the framework of topcolor-assisted technicolor model we calculate the contributions from thc pseudoGoldstone bosons and new gauge bosons to e+e- → tt. We find that for reasonable ranges of the parameters, thepseudo Goldstone bosons afford dominate contribution, the correction arising from new gauge bosons is negligibly small,the maximum of the relative corrections is ～ 10% with the center-of-mass energy s ＝ 500 GeV; whereas in the cascof s ＝ 1500 GeV, the relative corrections could be up to 16%. Thus large new physics might be observablc at theexperiments of next-generation linear colliders.
基金supported by the National Natural Science Foundation of China (Grant No.11147193)
文摘In this paper, we study the single neutral top-higgs (h0t) production processes at the CERN Large Hadron Collider (LHC) and the International Linear Collider (ILC). At the LHC, the production rates of processes pp→Z(W)h0t are too small to detect h0t . However, with the reasonable parameter values, the cross sections can reach the level of 102 fb for qq→qqh0t process and 103 fb for top quark associated production process pp→th0t+X, respectively. At the ILC, we study the single top-higgs production processes e-γ→νeW-h0t and γγ→W+W-h0t in e-γ and γγ collisions. It is found that the production cross sections can reach the level of a few fb with reasonable parameter values. Furthermore, such processes with the flavor-changing decay mode h0t→tc might provide typical signatures to detected the top-higgs. Therefore, it is hopeful to find the signal of top-higgs at the LHC and ILC experiments via theses processes and test the TC2 model directly.
