Takemi Hayashi

A Possible Interpretation of the New Event in the Cosmic Ray Experiment. II

In a previous paper we have analysed a new event observed by Niu and others in cosmic ray experiments, and have been able to present a reasonable interpretation of it on the basis of the new (modified) Nagoya model for urbaryons. Anticipating the accumulation of such new events, we shall give a further study in this paper, especially about the details of weak decay processes which were not fully developed in the previous work.

Electric dipole moments of neutron and electron in two-Higgs-doublet model with maximal CP violation.

We study the electric dipole moments(EDM) of the neutron and the electron in the two-Higgs-doublet model, in the case that CP symmetry is violated maximally in the neutral Higgs sector. We take account of the Weinberg’s operator O3g = GG ˜ G as

The Quark - Lepton Mass Matrices With the Fourth Generation and the Renormalization Group Equations

We study the effect of the fourth generation of quarks and leptons on the third one. We take two typical mass matrices at the grand unified scale: the Fritzsch type and the Stech type ones which are successful in the three generation scheme, and then calculate the evolutions of the Yukawa couplings and the mixing between the third generation quarks and the fourth ones using the renormalization group equations. We investigate them for the three cases: one Higgs doublet model, two Higgs doublets model and supersymmetric model, and obtain a rather large mixing, sin8=O.02~O.54 at the electroweak scale.

Penguin effects on Kπ and ππ decays of the B meson

Abstract We give the detailed analyses for the gluonic-penguin effect on the Kπ and ππ decays of the B meson. In the standard model, it is shown that the ratio BR (B→Kπ) BR (B→ππ) takes the value 0.5∼3.0, which strongly depends on the CP violating phase o and the KM matrix element |Vub|. We obtain the constraint on the form factor by using the experimental branching ratio. It is also found that, in the two-Higgs-doublet model, the charged Higgs contribution which could enhance the B→Xsγ decay does not give a sizable effect on the present processes. The effect of the final state interaction on these processes is also discussed.

On Selection Rule of Weak Processes and Decays of New Particles. II

Following a previous paper, we propose s~lection rules for weak processes. The first rule is .1n1=0, where n,=n+n; n(n) indicates an (anti-)urbaryon number. The second rule is that a dimensionality of the SU(3) representation of hadronic system is conserved along sor t-channel dependig on the parity property. These rules are applied to decay processes of new hadrons,_an indication of which has -been observed in a cosmic ray jet. We further attempt some conjectures on the second event that has recently been reported.

Non-Anomalous Flavor Symmetries and SU(6) ×SU(2)R Model

We introduce the flavor symmetry

Neutron electric dipole moment in two higgs doublet model

{\bf Z}_M \times {\bf Z}_N \times D_4

Penguin-diagram-induced B-->KX phi decays in the standard model and in the two-Higgs-doublet model.

into the

Particle Spectra and Gauge Unification in SU(6) ×SU(2)R Model

SU(6) \times SU(2)_R

Precocious Gauge Symmetry Breaking in SU(6) × SU(2)R Model

string-inspired model. The cyclic group