[en] A Left-Right symmetric model is constructed in which the number of generation is related to Grassmann variables. Two sets of complex Grassmann variables θ¹₂,θ²₂), (θ¹_l, θ²_l) are associated with left-and right-handed quark and lepton fields, respectively. Expanding quark and lepton fields in powers of the Grassmann variables, it was found that there are exactly three generations of quarks and leptons. Integrating out the Grassmann variables, phenomenologically acceptable fermion mass matrices were obtained. 5 refs

[en] The author analysed contributions to K_L → μ^+μ- from anomalous WWZ interactions. There are, in general, seven anomalous couplings. Among the seven anomalous couplings, only two of them contribute significantly. The others are suppressed by factors like m²_s/M²_W, m²_d/M²_W, or M²_K/M²_W. Using the experimental data on K_L → μ^+μ-, it is possible to obtain strong bounds on the two anomalous couplings. 10 refs., 6 tabs

[en] We argue that the accumulated neutrino data, including recent results from KamLAND and K2K, point to a neutrino mixing matrix with (V₁₁,V₂₁,V₃₁; V₂₁,V₂₂,V₃₂; V₁₃,V₂₃,V₃₃)=(-2/√6,1/√6,1/√6; 1/√3,1/√3,1/√3; 0,1/√2,-1/√2). We propose some simple neutrino mass matrices which predict such a mixing matrix

No abstract available

[en] CP violating electron-nucleon interactions and the resulting atomic electric dipole moments (EDM) are studied in several models. It is demonstrated that in the standard model these interactions are very small and are well below the experimental upper bounds. In multi-Higgs doublet models, the four-fermi interactions, can be quite large. In some range of parameters, the contribution of these interactions to the atomic EDM can exceed the contribution of the electron EDM. In leptoquark models the contribution from the tensor interaction is always the dominant one. 20 refs

[en] In this paper CP violating nucleon-nucleon interactions are studied in several models. The experimental upper bounds on atomic electric dipole moment (EDM) are used to constrain CP violating parameters. The constraints from this consideration were compared with that obtained from the upper bound on the neutron EDM. It was found that although the constraints from the former consideration are not yet as sensitive as the latter, in some models the constraints from both considerations are within an order of magnitude. 45 refs., 1 fig

[en] The original topological Aharonov-Casher (AC) effect is due to the interaction of the anomalous magnetic dipole moment (MDM) with certain configurations of electric field. Naively one would not expect an AC effect for a scalar particle for which no anomalous MDM can be defined in the usual sense. In this Letter we study the AC effect in supersymmetric systems. In this framework there is the possibility of deducing the AC effect of a scalar particle from the corresponding effect for a spinor particle. In 3+1 dimensions such a connection is not possible because the anomalous MDM is zero if supersymmetry is an exact symmetry. However, in 2+1 dimensions it is possible to have an anomalous MDM even with exact supersymmetry. Having demonstrated the relationship between the spinor and the scalar MDM, we proceed to show that the scalar AC effect is uniquely defined. We then compute the anomalous MDM at the one-loop level, showing how the scalar form arises in 2+1 dimensions from the coupling of the scalar to spinors. This model shows how an AC effect for a scalar can be generated for non-supersymmetric theories, and we construct such a model to illustrate the mechanism

[en] In this paper the contribution of a dimension six four quark operator (Q_q) to the neutron electric dipole moment was studied. It was found that this contribution dominates over other contributions by at least one order of magnitude in Left-Right symmetric models and two orders of magnitude in di-quark scalar models. 10 refs., 1 fig

[en] This contribution deals with CP violation in fermion pair decays of Higgs boson. Some CP odd observables related to the tree level decay amplitude are identified. It was found that a few thousand Higgs boson decay events can already provide important information about CP violation. If the Higgs boson is produced, such an analysis could be carried out at the new generation of colliders such as SCC, LHC and NLC. 11 refs

[en] We construct an invisible axion model which naturally explains the smallness of Dirac neutrino masses by generating the neutrino masses at the two-loop level. This model also provides a qualitative explanation for the fermion mass hierarchy m_t>>m_b, m_τ>>m_ν. The implications of a possible 17 keV neutrino are discussed. In particular a 17 keV heavy neutrino can have a cosmologically safe fast decay through ν_heavy→ν_light+axion. (orig.)