Rare B s decays in the relativistic quark model

B + c → D+ s D0 in a relativistic quark model.

Effective Hamiltonian of Electroweak Penguin for Hadronic b Quark Decays

In this research we work with the effective Hamiltonian and the quark model. We investigate the decay rates of matter-antimatter of quark. We describe the effective Hamiltonian theory and apply this theory to the calculation of current-current ( ), QCD penguin ( ), magnetic dipole ( ) and electroweak penguin ( ) decay rates. The gluonic penguin structure of hadronic decays is studied thro...

M ar 1 99 6 Semileptonic decays B → ( π , ρ ) eν in relativistic quark model

Quark model results for the B → π, ρ decays are analysed, making use of the dispersion formulation of the model: The form factors at q 2 > 0 are expressed as relativistic invariant double spectral representation over invariant masses of the initial and final mesons through their light–cone wave functions. The dependence of the results on the quark model parameters is studied. For various versio...

Rare decays B s → l + l − and B → Kl + l − in the topcolor - assisted technicolor model

We examine the rare decays Bs → l+l− and B → Kl+l− in the framework of the topcolor-assisted technicolor (TC2) model. The contributions of the new particles predicted by this model to these rare decay processes are evaluated. We find that the values of their branching ratios are larger than the standard model predictions by one order of magnitude in wide range of the parameter space. The longit...

Radiative decays of mesons in the quark model: relativistic and non-relativistic approaches

Different conclusions about quark nature of f0(980) based on the analysis of data on the reaction φ(1020) → γf0(980) make it necessary to perform detailed comparison of formulae used by various groups for the calculation of partial widths of radiative decays. We carry out a comparative analysis of methods of calculation of radiative decays like φ → γf0 and φ → γη performed by F.E. Close et al.,...