Kei Senba

The CP violation of theB→Kϕ decay at γ(4s) in the non-standard models

The CP violating asymmetry in theB→Kϕ decay is studied in both supersymmetric model and three Higgs doublets model. The absorptive part of the penguin amplitude leads to the CP violating asymmetry in theBu+-→K±ϕ decays, which is at most 3% due to the GIM mechanism in the standard model. However, the asymmetry could be relatively large if there exists a new source of the imaginary component in the decay amplitude. In the supersymmetric model, the contributions of the imaginary part of the super-penguin and the super-box processes rather suppress the magnitude of the asymmetry, whereas in the three Higgs doublets model, that of the charged Higgs-penguin process could significantly enhance it.

Meson decays of the glueball

Abstract We estimate the decay widths of the 0 ± -glueballs by taking account of the mixings with η and η ′ through their anomalous coupling. We find a pseudoscalar glueball with a broad decay width, if its mass is larger than m δ (980) + m π . On the other hand, a scalar glueball has a narrow decay width. Assuming E(1440) to be the pseudoscalar glueball, we predict Γ δ (980) π π ≈ 40 MeV.

The QCD sum rules for the E(1440) in J/Ψ decay

Abstract The QCD sum rules for a pseudoscalar glueball are phenomenologically examined. Analysing the ratio of the first and the second sum rules for the E(1440) as a candidate, the value of S /π)G μv a G μv a ¦0> is obtained. The decay widths of Ψ→ Eγ and E→ηππ are also estimated. It is remarked that the glueball sum rules are more sensitive to S /π) G μv a G μv a ¦0> than the charmonium ones.

Mixings and CP violations of the\(B^0 - \bar B^0 \) system in the four-generation model

AbstractWe study the mixings and CP violations in the

Particle ratios in electroproduction of kaons and symmetry properties of the quark-parton model

B^0 - \bar B^0

Heavy-quark effect on the Higgs-boson production in e+e− collisions

system together with the

Constraints on the Mean Values of Observables in Neutrino Reactions

K^0 - \bar K^0