Lint ∼ g ψ̄B′ φψB , (1.1) where B′ is the resonance that decays into baryon B and meson φ and g is a coupling constant. It is crucial that this interaction Lagrangian is linear in the meson field. If φ is a pseudoscalar meson this interaction yields the decay width Γ (B′ → Bφ) ∝ g2|~ pφ|, with ~pφ being the momentum of the outgoing meson. The situation is significantly different in soliton model...

Electroweak penguin (EWP) amplitudes are studied model-independently in B meson decays to charmless final states consisting of a vector meson (V ) and a pseudoscalar meson (P ). A set of SU(3) relations is derived between EWP contributions and tree amplitudes, in the approximation of retaining only the dominant EWP operators Q9 and Q10. Two applications are described for constraining the weak p...

Spin effects in B c → X c¯ c π(ρ) decays. Abstract The two-particle hadronic decays of B c meson into S-wave and P-wave charmonium states X c¯ c are considered in the framework of hard gluon exchange model. It is shown that decay width of B c meson into P-wave charmonium states exceeds one for S-wave states. In compare with the previous estimations we predict the enhancement by factor ∼ 2 the b...

After a brief look at CP violation in kaon decays, a short overview of CP violation in the B-meson system and of strategies to determine the angles of the unitarity triangles of the CKM matrix is given. Both general aspects and some recent developments are discussed, including B c → D ± s D and B → πK decays, as well as the Bd → π +π−, Bs → K +K− system. Invited plenary talk given at the 6th In...

Using a QCD relativistic potential model, previously applied to the calculation of the heavy meson leptonic constants, we evaluate the form factors governing the exclusive decays B → ρ`ν, B → Kγ and B → K``. In our approach the heavy meson is described as a Qq bound state, whose wave function is solution of the relativistic Salpeter equation, with an instantaneous potential displaying Coulombic...

Spin effects in B c → X c¯ c π(ρ) decays. Abstract The two-particle hadronic decays of B c meson into S-wave and P-wave charmonium states X c¯ c are considered in the framework of hard gluon exchange model. It is shown that decay width of B c meson into S-wave charmonium states doubly exceeds one for P-wave states. In compare with the previous estimations we predict the enhancement by 8 % the b...

The study of the semileptonic B-meson decays is the most accessible and cleanest way to determine the CKM matrix elements |Vcb| and Vub. These decays also provide experimental access to study the QCD form-factors, heavy quark masses, and HQE parameters. The theoretical description of semileptonic B-meson decays at the parton level is very simple because there is no interaction between leptonic ...

We study three-body nonleptonic decays B → V V P by introducing two-meson distribution amplitudes for the vector-pseudoscalar pair, such that the analysis is simplified into the one for two-body decays. The twist-2 and twist-3 φK two-meson distribution amplitudes, associated with longitudinally and transversely polarized φ mesons, are constrained by the experimental data of the τ → φKν and B → ...

We apply the diabatic approach, specially suited for a QCD based study of conventional (quark-antiquark) and unconventional (quark-antiquark + meson-meson) meson states, to description hidden-bottom mesons. A spectral analysis $I=0$, $J^{++}$ $1^{--}$ resonances with masses up about $10.8$ GeV is carried out. Masses widths all experimentally known resonances, including can be well reproduced. I...