Heavy-to-light meson form factors at large recoil

Richard J. Hill
Phys. Rev. D 73, 014012 – Published 18 January 2006

Abstract

Heavy-to-light meson form factors at large recoil can be described using the same techniques as for hard exclusive processes involving only light hadrons. Two competing mechanisms appear in the large recoil regime, describing so-called “soft-overlap” and “hard-scattering” components of the form factors. It is shown how existing experimental data from B and D decays constrain the relative size of these components, and how lattice data can be used to study properties such as the energy-scaling laws obeyed by the individual components. Symmetry relations between different form factors (F+, F0 and FT), and between different heavy initial-state mesons (B and D) are derived in the combined heavy-quark and large-recoil limits, and are shown to generalize corresponding relations valid at small recoil. Form-factor parametrizations that are consistent with the large-recoil limit are discussed.

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  • Received 20 June 2005

DOI:https://doi.org/10.1103/PhysRevD.73.014012

©2006 American Physical Society

Authors & Affiliations

Richard J. Hill*

  • Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309, USA

  • *Electronic address: rjh@slac.stanford.edu

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Issue

Vol. 73, Iss. 1 — 1 January 2006

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