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

Ball, P. and Zwicky, R. (2005) 'New results on B→π,K,η decay form factors from light-cone sum rules.', Physical review D : particles and fields., 71 . 014015.


We present an improved calculation of B--> 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 pi, K, and eta. 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.

Item Type:Article
Keywords:Pions distribution amplitude, Perturbative QCD correction, Asterisk-B-Pi, Quantum chromodynamics, Asymptotic-behavior, Exclusive processes, Wave-function, Heavy-quark, 2nd moment, Resonance physics.
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Publisher statement:© 2005 by The American Physical Society. All rights reserved.
Record Created:28 Apr 2008
Last Modified:08 Jan 2013 16:33

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