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A current algebra sum rule for the inclusive decays B −→ D + X + ℓ + ν by Bjorken et al. is used to obtain constraints on the Isgur-Wise function ξ(ω) for the B −→ Dℓν decays. In Heavy Quark Effective Theory (HQET) the calculation of weak current matrix elements of hadrons which contain heavy quarks is greatly simplified [1]–[6]. In general, six form(More)
It is suggested that the narrow meson state seen in the the SELEX experiment is a (c¯ ss¯ s) tetraquark state. Characteristics of other possible tetraquarks formed out of c and s quarks and antiquarks are considered. SELEX experiment has reported [1] a puzzling narrow meson state at a mass of 2632.6 ± 1.6 MeV/c 2 which decays preferentially to D + s (c¯ s)(More)
If the unitary quark-mixing matrix, V , is moduli symmetric then it depends on three real parameters. This means that there is a relation between the four parameters needed to parametrize a general V. It is shown that there exists a very simple relation involving |V 11 | 2 , |V 33 | 2 , ρ and η. This relation is compared with the present experimental data.(More)
A parametrization of the 3 × 3 Cabibbo-Kobayashi-Maskawa matrix , V , is presented in which the parameters are the eigenvalues and the components of its eigenvectors. In this parametrization, the small departure of the experimentally determined V from being moduli symmetric (i.e. |V ij | = |V ji |) is controlled by the small difference between two of the(More)
In this paper we study three active neutrino oscillations, favored by recent data from SuperK and SNO, using a new parametrization of the lepton mixing matrix V constructed from a linear combination of the unit matrix I, and a hermitian unitary matrix U , that is, V = cos θI + i sin θU. There are only three real parameters in V including the parameter θ. It(More)
A new approach to the parametrization of the CKM matrix, V , is considered in which V is written as a linear combination of the unit matrix I and a non-diagonal matrix U which causes intergenerational-mixing, that is V = cos θ I + i sin θ U. Such a V depends on 3 real parameters including the parameter θ. It is interesting that a value of θ = π/4 is(More)
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