New results on $B\ensuremath{\rightarrow}\ensuremath{\pi},K,\ensuremath{\eta}$ decay form factors from light-cone sum rules

New results on $B \to π, K, η$ decay form factors from light-cone sum rules

Patricia Ball and Roman Zwicky

Phys. Rev. D 71, 014015 – Published 18 January 2005

Abstract

We present an improved calculation of $B \to$ light pseudoscalar form factors from light-cone sum rules, including one-loop radiative corrections to twist-2 and twist-3 contributions, and leading-order twist-4 corrections. The total theoretical uncertainty of our results at zero momentum transfer is 10 to 13% and can be improved, at least in part, by reducing the uncertainty of hadronic input parameters, in particular, those describing the twist-2 distribution amplitudes of the $π$ , $K$ , and $η$ . We present our results in a way which details the dependence of the form factors on these parameters and facilitates the incorporation of future updates of their values from, e.g., lattice calculations.

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Received 22 June 2004

DOI:https://doi.org/10.1103/PhysRevD.71.014015

Authors & Affiliations

Patricia Ball^1,* and Roman Zwicky^2,†

¹IPPP, Department of Physics, University of Durham, Durham DH1 3LE, United Kingdom
²William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA

^*Electronic address: Patricia.Ball@durham.ac.uk
^†Electronic address: zwicky@physics.umn.edu

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Vol. 71, Iss. 1 — 1 January 2005

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Physical Review D

covering particles, fields, gravitation, and cosmology

New results on $B \to π, K, η$ decay form factors from light-cone sum rules

Patricia Ball and Roman Zwicky

Phys. Rev. D 71, 014015 – Published 18 January 2005

Abstract

Authors & Affiliations

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Physical Review D

covering particles, fields, gravitation, and cosmology

New results on B→π,K,η decay form factors from light-cone sum rules

Patricia Ball and Roman Zwicky

Phys. Rev. D 71, 014015 – Published 18 January 2005

Abstract

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New results on $B \to π, K, η$ decay form factors from light-cone sum rules