RADIATIVE LEPTONIC Bc DECAYS

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...

Radiative Non – Leptonic Kaon Decays

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.

Radiative leptonic decays of heavy mesons.

We compute the photon spectrum and the rate for the decays B(D) → lνlγ These photonic modes constitute a potentially large background for the purely leptonic decays which are used to extract the heavy meson decay constants. While the rate for D → lνγ is small, the radiative decay in the B meson case could be of comparable magnitude or even larger than B → μν. This would affect the determination...

Study of Radiative Leptonic D Meson Decays

We study the radiative leptonic D meson decays of D (s) → lνlγ (l = e, μ, τ), D → νν̄γ and D → llγ (l = e, μ) within the light front quark model. In the standard model, we find that the decay branching ratios of D (s) → eνeγ, D (s) → μνμγ and D (s) → τντγ are 6.9× 10 (7.7× 10), 2.5× 10 (2.6× 10), and 6.0× 10 (3.2× 10), and that of D → llγ (l = e, μ) and D → νν̄γ are 6.3× 10 and 2.7× 10, respectiv...