Form Factors for B→π and D→π Transitions

1994/05/05 by Hai-Yang Cheng
Physics and Astronomy · #hep-ph

paper · pdf

published as Chin.J.Phys. 32 (1994) 425-432 · 9 pages, IP-ASTP-10-94

arxiv created 1994/05/05 · arxiv updated 2009/11/30

Abstract

Armed with the information on the form factor \fdpi(0) inferred from recent CLEO measurements of SU(3)-breaking effects in charmed meson decays, we have studied the form factor \fbpi. In the heavy quark limit, \fbpi(q²) is related to \fdpi(q²) in the kinematic region close to zero recoil. Assuming pole dominance for its q² dependence, \fbpi(0) is estimated to be ≈ 0.39 . If the requirement of heavy quark symmetry is relaxed so that it applies only to soft pion emissions from the heavy meson, we find that \fbpi(0) is more likely of order 0.55∼ 0.60 .

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