SEESAW-TYPE QUARK MASS MATRIX AND NEUTRON ELECTRIC DIPOLE MOMENT

1996 ◽  
Vol 11 (22) ◽  
pp. 1835-1842
Author(s):  
KEN WATANUKI ◽  
ICHIRO OHBA
Keyword(s):  
Dipole Moment ◽  
Higgs Boson ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Quark Mass ◽  
Mass Matrix ◽  
Neutron Electric Dipole Moment ◽  
Neutral Higgs Boson ◽  
Experimental Bound

The neutron electric dipole moment (EDM) is investigated in detail. We assume a phenomenologically successful seesaw-type quark mass matrix. If the neutron EDM is observed at slightly below the present experimental bound (10–26–10–25 e · cm ), we can conclude that there must exist a vector-like quark a little heavier than the heavier neutral Higgs boson, or both of them have equal masses around 1 TeV.

scholarly journals Neutron electric dipole moment due to Higgs-boson exchange in left-right-symmetric models

1992 ◽  
Vol 46 (9) ◽  
pp. 3876-3883 ◽  
Author(s):  
D. Chang ◽  
Xiao-Gang He ◽  
W. -Y. Keung ◽  
B. H. J. McKellar ◽  
D. Wyler
Keyword(s):  
Dipole Moment ◽  
Higgs Boson ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Boson Exchange

THE ELECTRIC DIPOLE MOMENT OF THE TOP

1994 ◽  
Vol 09 (04) ◽  
pp. 327-333 ◽  
Author(s):  
SAJJAD MAHMOOD
Keyword(s):  
Dipole Moment ◽  
Higgs Boson ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Top Quark ◽  
Neutral Higgs Boson ◽  
Higgs Exchange ◽  
Electroweak Model

In an extension of the standard electroweak model with two-Higgs doublets the electric dipole moment of the top quark is estimated. It is observed that effects of Higgs exchange are significantly enhanced for a neutral Higgs boson lighter than the top quark.

scholarly journals The CKM phase and $$ \overline{\theta} $$ in Nelson-Barr models

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Alessandro Valenti ◽  
Luca Vecchi
Keyword(s):  
Dipole Moment ◽  
Parameter Space ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Necessary Conditions ◽  
Neutron Electric Dipole Moment ◽  
Loop Order ◽  
Quark Masses ◽  
Experimental Bound

Abstract We analyze the Nelson-Barr approach to the Strong CP Problem. We derive the necessary conditions in order to simultaneously reproduce the CKM phase and the quark masses. Then we quantify the irreducible contributions to the QCD topological angle, namely the corrections arising from loops of the colored fermion mediators that characterize these models. Corrections analytic in the couplings first arise at 3-loop order and are safely below current bounds; non-analytic effects are 2-loop order and decouple as the mediators exceed a few TeV. We discuss collider, electroweak, and flavor bounds and argue that most of the parameter space above the TeV scale is still allowed in models with down-type mediators, whereas other scenarios are more severely constrained. With two or more families of mediators the dominant experimental bound is due to the neutron electric dipole moment.

scholarly journals Neutron electric dipole moment using lattice QCD simulations at the physical point

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
C. Alexandrou ◽  
A. Athenodorou ◽  
K. Hadjiyiannakou ◽  
A. Todaro
Keyword(s):  
Dipole Moment ◽  
Lattice Qcd ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Physical Point
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