Form factors, branching ratio and forward–backward asymmetry in B→K1ℓ+ℓ- decays

Form factors , branching ratio and forward – backward asymmetry in B → K 1 + − decays

We study long-distance effects in the rare exclusive semileptonic decays B →K1 + , where K1 is the axial vector meson. The form factors describing the meson transition amplitudes of the effective Hamiltonian are calculated using the Ward identities, which are then used to calculate the branching ratio and the forward–backward asymmetry in these decay modes. The zero of the forward–backward asym...

Se p 20 07 Form factors , branching ratio and forward - backward asymmetry in B → K 1 l + l − decays

We study long-distance effects in rare exclusive semileptonic decays B → K1ll , K1 is the axial vector meson.The form factors, describing the meson transition amplitudes of the effective Hamiltonian, are calculated using Ward identites which are then used to calculate branching ratio and forward-backward asymmetry in these decay modes. The zero of forward-backward asymmetry is of special intere...

Direct CP Violation , Branching Ratios and Form Factors B → π , B → K in B Decays

The B → π and B → K transitions involved in hadronic B decays are investigated in a phenomenological way through the framework of QCD factorization. By comparing our results with experimental branching ratios from the BELLE, BABAR and CLEO Collaborations for all the B decays including either a pion or a kaon, we propose boundaries for the transition form factors B → π and B → K depending on the...

Branching ratio and direct CP - violating rate asymmetry

We calculate CP-violating rate asymmetries in the rare radiative decays B → Kγ and B → ργ. They arise because of the interference between leading-order penguin amplitudes and one-gluon corrections with absorptive phases, and provide unambiguous evidence for direct CP violation. Complementing earlier studies, we also investigate gluon exchange with the ‘spectator’ quark. The bound state effects ...

SLAC-R-860 Review of Exclusive B → D (∗,∗∗) lν Decays – Branching Fractions, Form-factors and |Vcb|