On the Phase of B0B^0--B0ˉ\bar {B^0} Mixing Matrix Elements in the SUSY Standard Model

It is shown that the complex phase of $B^0$--$\bar {B^0}$ mixing matrix element is same as that of the standard model one up to the minor correction of the order of $(m_c/m_t)^2$ or less in the SUSY standard model. This conclusion is valid as far as the Yukawa coupling constants are perturbative and realistic, and can be available for other realistic models where generation mixing and CP violation are solely due to Yukawa interaction among quarks and Higgs doublets.Comment: 8 pages, LaTeX file, figures appended in uuencoded gzipped EPS forma

Agricultural Cooperatives in Japan: An Institutional Approach

How can we explain the reason why cooperatives have evolved so differently? This article argues that the institutional framework gives a decisive influence in organizational evolution and the historic path has been taken by interaction between institutions and organizations. The Japanese agricultural cooperatives are analyzed from institutional perspectives. They were created at the end of the 19th century under overwhelming European influence but evolved as a quite different model under the strong impacts of industrial policies and institutions. They developed as multi-purpose cooperatives bearing triple natures as state agency, pressure group and cooperative per se. The new economy is shifting public policy from protectionist to procompetition and the resulting institutional changes are posing challenges to cooperatives. Their future depends on their willingness to innovate themselves by adjusting to the new environment while applying cooperative advantages.Agribusiness,

Updates of WRW_R effects on CP angles determination in B decays

The recently observed CP violation in B decay and $B$-\ovar{B} mixing data put constraints on the mass of $W_R$ and the parameters of the right-handed current quark mixing matrix $V^R$ in $SU(2)_L \times SU(2)_R\times U(1)$ gauge model. It is shown that the allowed region of parameters are severely restricted for light $W_R$ with mass on the order of 1 TeV. There exist sets of parameters which can accommodate large CP violation as measured by Belle, $\sin2\phi_1|_{exp}\simeq 1$, for $M_{W_R}=1 \sim 10$ TeV.Comment: 11pages, 19 figures, LaTeX2

Chiral Lagrangian with higher resonances and flavour SU(3) SU(3) breaking

A chiral Lagrangian with $SU(3)$ breaking and higher resonances is proposed. In this model, the $SU(3)$ breaking structure in vector-pseudoscalar sector is realized with the decay constants of pseudoscalar mesons and the masses of vector mesons used as inputs. We examine whether the resulting $SU(3)$ breaking effect in the charge radii of pseudoscalar mesons is consistent with the experimental facts.Comment: 29 pages, REVTEX(ver.3), DPNU-93-3