Radiative Leptonic Decays of Heavy Mesons

Details Radiative Leptonic Decays of Heavy Mesons Radiative Leptonic Decays of Heavy Mesons

1994-05-31

arxiv.org/abs/hep-ph/9405425v1

Phys.Rev.D51:111-117,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, RevTex, 3 uuencoded figures included

Scientific paper

10.1103/PhysRevD.51.111

We compute the photon spectrum and the rate for the decays $B(D)\to l\nu_l\gamma$ 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 $D\to l\n\g$ is small, the radiative decay in the $B$ meson case could be of comparable magnitude or even larger than $B\to\m\n$. This would affect the determination of $f_B$ if the $\tau$ channel cannot be identified. We obtain theoretical estimates for the photonic rates and disscuss their possible experimental implications.

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