PURE LEPTONIC RADIATIVE DECAYS B±, Ds→ℓνγ AND THE ANNIHILATION GRAPH

Pure Leptonic Radiative Decays B

Pure leptonic radiative decays of heavy-light mesons are calculated using a very simple non-relativistic model. Dominant contribution originates from photon emission from light initial quark. We find BR(B ± → ℓνγ) ∼ 3.5 × 10 −6 and BR(D s → ℓνγ) ∼ 1.7 × 10 −4. The importance of these reactions to clarify the dynamics of the annihilation graph is emphasized.

Pure Leptonic Radiative Decays B ± , D s → ` νγ and the Annihilation Graph

Radiative and Leptonic B-meson Decays from the B-factories

Radiative penguin decays of B-mesons, in which a b quark transitions to an s or d quark accompanied by either a photon or a pair of charged leptons (Fig. 1), are a sensitive probe of New Physics (NP) beyond the Standard Model (SM). These flavour changing neutral current decays are forbidden at tree level in the SM and hence strongly suppressed. In many NP scenarios these decays appear at the on...

Radiative Leptonic Decays of B c Meson

To the leading order, the radiative leptonic decays Bc → γlν̄ ( l = e, μ ) are studied carefully. In the study, a non-relativistic constituent quark model and the effective Lagrangian for the heavy flavour decays are used. As a result, the branching ratios turn out to be of the orders of 10 for Bc → γμν̄ or for Bc → γeν̄. Based on the study, we point out the decays being accessible experimentally ...

Radiative Leptonic Bc Decays

We analyze the radiative leptonic Bc decay mode: Bc → `νγ (` = e, μ) using a QCD-inspired constituent quark model. The prediction: B(Bc → `νγ) ' 3× 10−5 confirms that this channel is experimentally promising in view of the large number of Bc mesons which are expected to be produced at the future hadron facilities. E-mail address: [email protected] E-mail address: [email protected] Recen...