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Theoretical and phenomenological constraints on form factors for radiative and semi-leptonic B-meson decays

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Abstract

We study transition form factors for radiative and rare semi-leptonic B-meson decays into light pseudoscalar or vector mesons, combining theoretical constraints and phenomenological information from Lattice QCD, light-cone sum rules, and dispersive bounds. We pay particular attention to form factor parameterisations which are based on the so-called series expansion, and study the related systematic uncertainties on a quantitative level. In this context, we also provide the NLO corrections to the correlation function between two flavour-changing tensor currents, which enters the unitarity constraints for the coefficients in the series expansion.

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Authors and Affiliations

  1. IPPP, Department of Physics, University of Durham, Durham, DH1 3LE, U.K.

    Aoife Bharucha

  2. Physik-Department, Technische Universität München, D-85748, Garching, Germany

    Thorsten Feldmann & Michael Wick

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  1. Aoife Bharucha
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  2. Thorsten Feldmann
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  3. Michael Wick
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Correspondence to Thorsten Feldmann.

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ArXiv ePrint: 1004.3249

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Bharucha, A., Feldmann, T. & Wick, M. Theoretical and phenomenological constraints on form factors for radiative and semi-leptonic B-meson decays. J. High Energ. Phys. 2010, 90 (2010). https://doi.org/10.1007/JHEP09(2010)090

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