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Particles and Fields

Eur. Phys. J. C 21, 115-121 (2001)
DOI: 10.1007/s100520100734

Semi-leptonic B decays and the two-pion distribution amplitudes

M. Maul

Department of Theoretical Physics, Lund University, Sölvegatan 14A, 223 62 Lund, Sweden

(Received: 11 April 2001 / Published online: 19 July 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

We show that the semi-leptonic decay $B^+ \to \pi^+\pi^-\ell^+\nu_\ell$ can be used as a source of information for two-pion distribution amplitudes. The connection between these amplitudes and the B-meson decay width is achieved by the light cone sum rule method. We show the relevant distribution amplitudes and give the formula for the decay width.

© Società Italiana di Fisica, Springer-Verlag 2001