<i>CP</i>violation in semileptonic top quark decays in the Weinberg model

Atwood, David; Eilam, G.; Soni, Amarjit; Mendel, R. R.; Migneron, R.

doi:10.1103/physrevlett.70.1364

Cited by 26 publications

(28 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They turn out to give a large correction, of about 50% and of the same sign, as compared to the value of A τ calculated in [42] using only G T . The minimal number of t-quarks required to observe CP violation in PRA within the 3HDM is -although many orders of magnitudes larger than the best leptonic SM result (i.e., t → dℓν [47]) -of the order of 10 10 − 10 11 and thus not very promising.…”

Section: Pra In a 3hdmmentioning

confidence: 96%

“…Sinceψψ andψiγ 5 ψ have opposite P , T and CP transformation properties, P and CP can be violated through the exchange of neutral Higgs-bosons. We will now briefly mention some of the more notable constraints on this class of models [42,113,114,115]. One class of restrictions that are of some importance follow (as in the case of the 2HDM) if we further assume that the Higgs sector of the theory is perturbative [87].…”

Section: Three Higgs Doublet Modelmentioning

confidence: 99%

“…Often such asymmetries can be larger than α P RA since the portion of the final states not included in the integral may themselves be the compensating process. For example, in [42] it was shown that detecting CP violation effects in the process t → bτ ν τ through α P IRA is more efficient than through α P RA as the former is driven by tree-level diagrams and the latter by 1-loop diagrams. A related observable which is also CP-odd and T N -even is the energy asymmetry…”

Section: ≡ M(a →mentioning

confidence: 99%

“…The other reasons are the proportionality of both the Higgs coupling and ℑmĜ L to small fermion masses. 15 The next logical step is to capitalize on the resonance behavior of ℑm G T and the fact that, unlike ℑm G L , it is not proportional to small masses, by considering interferences that are higher order in the weak interaction coupling constant [42]. Thus, PRA from interferences of the type ℑm (a)× ℜe (b) and ℜe (c)× ℑm (d), is calculated; (a)-(d) denote the diagrams in Fig.…”

Section: Pra In a 3hdmmentioning

confidence: 99%

“…Subsequently, the following contributions to A τ , explicitly neglected in [42], were calculated in [159]:…”

Section: Pra In a 3hdmmentioning

confidence: 99%

See 4 more Smart Citations

CP violation in top physics

et al. 2001

View full text Add to dashboard Cite

CP violation in top physics is reviewed. The Standard Model has negligible effects, consequently CP violation searches involving the top quark may constitute the best way to look for physics beyond the Standard Model. Non-standard sources of CP violation due to an extended Higgs sector with and without natural flavor conservation and supersymmetric theories are discussed. Experimental feasibility of detecting CP violation effects in top quark production and decays in high energy e + e − , γγ, µ + µ − , pp and pp colliders are surveyed. Searches for the electric, electro-weak and the chromo-electric dipole moments of the top quark in e + e − → tt and in pp → ttX are descibed. In addition, other mechanisms that appear promising for experiments, e.g., tree-level CP violation in e + e − → tth, ttZ, ttν eνe and in the top decay t → bτ ν τ and CP violation driven by s-channel Higgs exchanges in pp, γγ, µ + µ − → tt etc., are also discussed. * A 2-up version of this postscript file may be obtained at the url

show abstract

Section: Pra In a 3hdmmentioning

confidence: 96%

Section: Three Higgs Doublet Modelmentioning

confidence: 99%

Section: ≡ M(a →mentioning

confidence: 99%

Section: Pra In a 3hdmmentioning

confidence: 99%

“…Subsequently, the following contributions to A τ , explicitly neglected in [42], were calculated in [159]:…”

Section: Pra In a 3hdmmentioning

confidence: 99%

See 3 more Smart Citations

CP violation in top physics

et al. 2001

View full text Add to dashboard Cite

show abstract

The decay rate asymmetry of the top quark

Grza̧dkowski

Keung

1993

Physics Letters B

View full text Add to dashboard Cite

The asymmetriesin the partial widths of the top quark decays are discussed within the Standard Model (SM), the Two-Higgs-Doublet Model (2HDM) and supersymmetric extensions of the SM (SSM). The leading contributions to these asymmetries in the SM and in the 2HDM are induced by the up-type quark self-energy diagrams and are found to be very small. However, in the SSM, the asymmetry A b can be substantial, O(α QCD ), provided the CP-violating phase of gluino-top-stop couplings is not suppressed. Within the SSM A b is generated by the vertex corrections.

show abstract

Maximal CP violation in the Higgs sector and its effect on the ρ parameter

1994

View full text Add to dashboard Cite

We study the conditions of maximal CP violation in the neutral Higgs mass matrix of the two Higgs doublet model. We get fixed values of tan β and constraints on the Higgs potential parameters. Two neutral Higgs scalars are constrained to be lighter than the charged Higgs scalar and these two Higgs scalars are expected to be almost degenerate due to the smallness of the h parameter, where h is the CP violating coupling constant of the Higgs interaction. The radiative correction of the ρ parameter from the Higgs scalar exchange is rather small and its sign negative for a wide range of Higgs masses. It follows that maximum CP violation in the two Higgs doublet model is safely allowed for the ρ parameter without the custodial symmetry.

show abstract

CPviolation in semileptonic top quark decays in the Weinberg model

Cited by 26 publications

References 27 publications

CP violation in top physics

CP violation in top physics

The decay rate asymmetry of the top quark

Maximal CP violation in the Higgs sector and its effect on the ρ parameter

Contact Info

Product

Resources

About