Rare decays of the top quark in the one generation technicolor model

1994 ◽  
Vol 50 (9) ◽  
pp. 5781-5786 ◽  
Author(s):  
Xuelei Wang ◽  
Gongru Lu ◽  
Jinmin Yang ◽  
Zhenjun Xiao ◽  
Chongxing Yue ◽  
...  
Keyword(s):  
Rare Decays ◽  
Top Quark ◽  
Technicolor Model ◽  
The One

The Contributions of PGBs in the One-Generation Technicolor Model on the Rare Decays t → cZ,cγ

1995 ◽  
Vol 24 (3) ◽  
pp. 359-362 ◽  
Author(s):  
Xue-Lei Wang ◽  
Yi-Min Zhang ◽  
Jin-Min Yang ◽  
Gong-Ru Lu
Keyword(s):  
Rare Decays ◽  
Technicolor Model ◽  
The One

Rare decays of the top quark in the top-color-assisted multiscale technicolor model

1998 ◽  
Vol 57 (3) ◽  
pp. 1755-1761 ◽  
Author(s):  
Gongru Lu ◽  
Chongxing Yue ◽  
Jinshu Huang
Keyword(s):  
Rare Decays ◽  
Top Quark ◽  
Technicolor Model

Rare decays of the top quark in the technicolour model with a massless scalar doublet

1996 ◽  
Vol 22 (3) ◽  
pp. 305-314 ◽  
Author(s):  
Gongru Lu ◽  
Yang Hua ◽  
Xuelei Wang ◽  
Jinmin Yang ◽  
Wenqi Sun
Keyword(s):  
Rare Decays ◽  
Top Quark ◽  
Massless Scalar

scholarly journals Electroweak fermion triangle loop contributions to the muon anomalous magnetic moment revisited

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Ken Sasaki
Keyword(s):  
Magnetic Moment ◽  
Top Quark ◽  
Anomalous Magnetic Moment ◽  
Ward Identity ◽  
Axial Vector ◽  
Goldstone Boson ◽  
Muon Anomalous Magnetic Moment ◽  
Feynman Gauge ◽  
Unitary Gauge ◽  
The One

Abstract The contribution to the muon anomalous magnetic moment from the fermion triangle loop diagrams connected to the muon line by a photon and a $Z$ boson is re-analyzed in both the unitary gauge and the ’t Hooft–Feynman gauge. With use of the anomalous axial-vector Ward identity, it is shown that the calculation in the unitary gauge exactly coincides with the one in the ’t Hooft–Feynman gauge. The part which arises from the ordinary axial-vector Ward identity corresponds to the contribution of the neutral Goldstone boson. For the top-quark contribution, the one-parameter integral form is obtained up to the order of $m_\mu^2/m_Z^2$. The results are compared with those obtained by the asymptotic expansion method.

scholarly journals Color-singlet and color-octetJ/ψproduction in top quark rare decays

1998 ◽  
Vol 57 (1) ◽  
pp. 610-613 ◽  
Author(s):  
Feng Yuan ◽  
Cong-Feng Qiao ◽  
Kuang-Ta Chao
Keyword(s):  
Rare Decays ◽  
Top Quark ◽  
Color Singlet

scholarly journals Fermion mass hierarchy in grand gauge-Higgs unification

2019 ◽  
Vol 2019 (8) ◽  
Author(s):  
Nobuhito Maru ◽  
Yoshiki Yatagai
Keyword(s):  
Top Quark ◽  
Electroweak Symmetry Breaking ◽  
Boson Mass ◽  
Fermion Mass ◽  
Mass Hierarchy ◽  
Electroweak Symmetry ◽  
Fermion Masses ◽  
The Standard Model ◽  
Mass Terms ◽  
The One

Abstract Grand gauge-Higgs unification of 5D $SU(6)$ gauge theory on an orbifold $S^1/Z_2$ is discussed. The Standard Model (SM) fermions are introduced on one of the boundaries and some massive bulk fields are also introduced so that they couple to the SM fermions through the mass terms on the boundary. Integrating out the bulk fields generates SM fermion masses with exponentially small bulk mass dependences. The SM fermion masses except for the top quark are shown to be reproduced by mild tuning of the bulk masses. The one-loop Higgs potential is calculated and it is shown that electroweak symmetry breaking occurs by introducing additional bulk fields. The Higgs boson mass is also computed.

scholarly journals Rare decays of the top quark mediated by Z′ gauge bosons and flavor violation

2020 ◽  
Vol 35 (18) ◽  
pp. 2050153
Author(s):  
J. I. Aranda ◽  
D. Espinosa-Gómez ◽  
J. Montaño ◽  
F. Ramírez-Zavaleta ◽  
E. S. Tututi
Keyword(s):  
Gauge Boson ◽  
Top Quark ◽  
Branching Ratios ◽  
Gauge Bosons ◽  
Flavor Violation ◽  
Gauge Symmetries ◽  
Quark Decays ◽  
The Standard Model ◽  
Order Of Magnitude ◽  
The One

The rare top quark decays mediated by a new neutral massive gauge boson that is predicted in models with extended gauge symmetries are studied. We focus on the processes [Formula: see text] induced at the one loop level, where [Formula: see text], by considering different extended models. It is found that, within a broad range of mass of the new neutral gauge boson, the models predict branching ratios for the decays in study that are competitive with respect to the corresponding branching ratios in the Standard Model (SM). In order to establish bound on our branching ratios, we consider the recent experimental bounds as [Formula: see text], depending on the model, which also impose restrictions on our calculation. Even in this case, the resulting branching ratios are of the same order of magnitude as that predicted by the SM. It should be noted that for the case of two models studied here, since no experimental bound exists to compare with, the results could be important, as they are, in the best of cases, two orders of magnitude larger than the predicted by the SM.

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