[en] Using simple analytical methods based on the Wolfenstein phenomenological parametrization of the Kobayashi-Maskawa mixing matrix, we consider the predictions arising from the quark mass matrices proposed by Fritzsch, Stech and Gronau-Johnson-Schechter, respectively

[en] The 3 x 3 Kobayashi-Maskawa matrix V is parametrized, without using a CP violation phase parameter explicitly, by four independent parameters α ≡ |V_us|, β ≡ |V_cb|, γ ≡ |_ub| and ω ≡ |V_cd|² - |V_us|². The rephasing-invariant quantity J of CP nonconservation is estimated by means of extrapolation form J = 0 at γ² = 0. It is speculated that |J| ≅ αβγ ≅ 3.8 x 10^-5 and ω = -α²β² ≅ 9.4 x 10^-5

[en] The decay of heavy quarks (b and t) is studied with the help of spectral functions. As much information as possible is directly taken from experiment. Older computations in the free quark approximation are supported. This is important for the extraction of Kobayashi-Maskawa matrix elements from experiments. (Author)

[en] We review the present experimental results on Kaon decays needed for the extraction of the CKM matrix element vertical bar Vus vertical bar

[en] We discuss all possible rephasing invariants of the Kobayashi-Maskawa matrix. We find that all CP-violation phenomena of the KM matrix are expressed by linear or quadratic functions of one special class of nine invariants and the imaginary parts of these invariants are the same with respect to the KM angles and phase i.e. C₁C₂C₃S₁²S₂S₃ sindelta where C/sub i/ = costheta/sub i/ and S/sub i/ = sintheta/sub i/

[en] It is pointed out that the parametrization of the Kobayashi-Maskawa matrix recently put forward by Kielanowski suggests an Ansatz for that matrix which, though different from the one of Kielanowski, is for all practical purposes indistinguishable from it

[en] I discuss the calculation of ε'/ε in the standard model emphasising what can be calculated and where the uncertainties lie. (author)

[en] A summary of constraints on the CKM angle γ from recent LHCb analyses are discussed. The results of a combination of several LHCb measurements of γ are presented, giving $\mathrm{\gamma <!--\; ??\; -->}=({70.9}_{{}_{-<!--\; ???\; -->8.5}}^{{}^{+7.1}}{)}^{\circ <!--\; ???\; -->},$ where the single uncertainty is a combination of statistical and systematic sources. This represents the most precise measurement of the angle γ. (paper)

[en] We present the update of the Unitarity Triangle analysis in a scenario beyond the Standard Model. Combining all available experimental and theoretical information on D F=2 processes and using a model-independent parameterization, we extract the allowed New Physics contributions in the kaon, D, B_d, and B_s sectors. We observe a departure from the S M in the B_s sector.

[en] A unified form of mass matrix proposed previously for all fundamental fermions is extended to include the sterile neutrino ν_s, presumed to mix mainly with ν_e, while ν_τ mixes strongly with ν_μ (and both ν_μ and ν_τ weakly with ν_e and ν_s). It turns out that the former mixing can be responsible for oscillations of solar neutrinos, while the latter for those of atmospheric neutrinos, which is an agreement with the recent Super-Kamiokande findings. It is mentioned that ν_s is one of the two sterile neutrinos, possible from a viewpoint of an algebraic construction. The charged-lepton factor U^(e) in the leptonic four-dimensional Cabibbo-Cobayashi-Maskawa matrix V=U^(ν)†U^(e) is determined through the small deviation of the previous prediction m_r=1776.80 MeV (valid at the level of U^(e) = 1) from the experimental value m_r=1777.00^+0.30_-0.27 MeV. Then, it gives corrections to the four-dimensional mixing of ν_e, ν_τ,ν_μ, and ν_s leading, in particular, to small ν_e → ν_μ and ν_e → ν_τ oscillations (absent at the level of U^(e) = 1), in consistency with the CHOOZ negative result. However, the LSND estimates of ν^-_μ→ ν^-_e and ν_μ→ ν_e oscillations are too large to be explained by these corrections, though in the case of ν_μ→ ν_e they seem to be at the edge of such possible explanation