Generalized Heavy-to-Light Form Factors in Light-Cone Sum Rules

Abstract

We study the form factors for a heavy meson into the S-wave $K\pi /\pi \pi$ system with an invariant mass below 1~GeV. The mesonic final state interactions are described in terms of the scalar form factors, which are obtained from unitarized chiral perturbation theory. Employing generalized light-cone distribution amplitudes, we compute the heavy-to-light transition using light-cone sum rules. Our approach simultaneously respects constraints from analyticity and unitarity, and also takes advantage of the power expansion in the $1/m_b$ and the strong coupling constant.

8 pages, 3 figures, v2: 11 pages, 3 figures, title changed, some clarifications and references added, matches version to appear in Physics Letters B

References in corpus (13)

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• Study of B --> pi l nu and B --> rho l nu Decays and Determination of |V_ub|
• Scalar K pi form factor and light quark masses
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• Matching Chiral Perturbation Theory and the Dispersive Representation of the Scalar Kpi Form Factor
• The effect of S-wave interference on the $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ angular observables
• ${\mathbf{B}}_{\mathbf{s}}\to {\mathbf{K}}^{(\ast )}\mathbf{\ell }\bar{\nu }$, Angular Analysis, S-wave Contributions and $|{\mathbf{V}}_{\mathbf{ub}}|$
• Scalar resonance effects on the B_s - \bar B_s mixing angle
• Instanton effects on the twist-three light-cone distribution amplitudes of pion and light scalar mesons above 1GeV

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