The general<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>↔</mml:mo><mml:mrow><mml:msup><mml:mover><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msu

McWilliams, Bruce M.; Shanker, O.

doi:10.1103/physrevd.22.2853

Cited by 36 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We now compute the Fourier transform of these wave functions and substitute the result into Eqs. (18) and (17). Note that the form factor vanishes if a y 5 is present, so that pseudoscalar exchange does not contribute.…”

Section: I\mentioning

confidence: 99%

See 1 more Smart Citation

RareBdecays, rareτdecays, and grand unification

1991

View full text Add to dashboard Cite

In multi-Higgs-boson extensions of the standard model, tree-level flavor-changing neutral currents exist naturally, unless suppressed by some symmetry. For a given rate, the exchanged scalar or pseudoscalar mass is very sensitive to the flavor-changing coupling between the first two generations. Since the Yukawa couplings of the first two generations are unknown and certainly very small, bounds which rely on some assumed value of this flavor-changing coupling are quite dubious. One might expect the size (and reliability) of the Yukawa couplings involving the third generation to be greater. In this paper, we consider processes involving T'S and B's, and determine the bounds on the flavor-changing couplings which involve third-generation fields. The strongest bound in the quark sector comes from B-B mixing and in the lepton sector, surprisingly, from p-+ey. It is then noted that the flavor-changing couplings in the quark sector are related to those in the lepton sector in many grand unified theories, and one can ask whether an analysis of rare r decays or rare B decays will provide the strongest constraints. We show that rare B decays provide the strongest bounds, and that no useful information can be obtained from rare r decays. It is also noted that the most promising decay modes are B-Kpr and B , +~T , and we urge experimenters to look for rare decay modes of the B in which a r is in the final state.

show abstract

Section: I\mentioning

confidence: 99%

“…and inserts the vacuum state in the matrix element, then the fact that the kaon is a pseudoscalar implies that the matrix element for scalar exchange will vanish. The scalar matrix element has been calculated [17] and is smaller by a factor of 12. _This will lower the bound on the mass by a factor of g 1 2 .…”

Section: B Two-body Decaysmentioning

confidence: 99%

RareBdecays, rareτdecays, and grand unification

1991

View full text Add to dashboard Cite

show abstract

“…We find the contributions from new gauge bosons are far below the SM prediction in Eq. (56). The CP violation in K L → πνν is still dominated by SM contribution.…”

Section: Semi-leptonic Decay Of Kaonmentioning

confidence: 97%

SU(3)Fgauge family model and new symmetry breaking scale from FCNC processes

Bao

Liu

2016

Nuclear Physics B

View full text Add to dashboard Cite

Based on the SU (3) F gauge family symmetry model which was proposed to explain the observed mass and mixing pattern of neutrinos, we investigate the symmetry breaking, the mixing pattern in quark and lepton sectors, and the contribution of the new gauge bosons to some flavour changing neutral currents (FCNC) processes at low energy. With the current data of the mass differences in the neutral pseudo-scalar P 0 −P 0 systems, we find that the SU (3) F symmetry breaking scale can be as low as 300TeV and the mass of the lightest gauge boson be about 100TeV. Other FCNC processes, such as the lepton flavour number violation process µ − → e − e + e − and the semi-leptonic rare decay K → πνν, contain contributions via the new gauge bosons exchanging. With the constrains got from P 0 −P 0 system, we estimate that the contribution of the new physics is around 10 −16 , far below the current experimental bounds.

show abstract

“…where R qbh are the coefficients of the Feynman rules with q = d, s. In terms of the operators O F ∆F =2 defined in [14,15], we have that…”

Section: Constraints In the Quark Sectormentioning

confidence: 99%