Radiative Leptonic B Decays in the Light Front Model

Details Radiative Leptonic B Decays in the Light Front Model Radiative Leptonic B Decays in the Light Front Model

1997-10-13

arxiv.org/abs/hep-ph/9710323v1

Phys.Rev. D57 (1998) 5697-5702

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 Figures, LaTex file

Scientific paper

10.1103/PhysRevD.57.5697

Within the light front framework, we calculate the form factors for $B\to\gamma$ transitions directly in the entire physical range of momentum transfer. Using these form factors, we study the radiative decays of $B\to l\nu_l\gamma$ and $B_{s(d)}\to\nu\bar{\nu}\gamma$. We show that the decay rates of $B\to l\nu_l\gamma (l=e,\mu)$ and $B\to\nu\bar{\nu}\gamma$ are larger than that of the corresponding purely leptonic modes. Explicitly, in the standard model, we find that the branching ratios of $B\to \mu\nu_{\mu}\gamma$ and $B_s\to\nu\bar{\nu}\gamma$ are $3.7\times 10^{-6}$ and $5.0\times 10^{-8}$, in contrast with $3\times 10^{-7}$ and 0 for $B\to\mu\nu_{\mu}$ and $B\to\nu\bar{\nu}$, respectively.

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