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Light-cone distribution amplitudes for heavy-quark hadrons

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Abstract

We construct parametrizations of light-cone distribution amplitudes (LCDAs) for B-mesons and Λ b -baryons that obey various theoretical constraints, and which are simple to use in factorization theorems relevant for phenomenological applications in heavy-flavour physics. In particular, we find the eigenfunctions of the Lange-Neubert renormalization kernel, which allow for a systematic implementation of renormalization-group evolution effects for both B-meson and Λ b -baryon decays. We also present a new strategy to construct LCDA models from momentum-space projectors, which can be used to implement Wandzura-Wilczek-like relations, and which allow for a comparison with theoretical approaches that go beyond the collinear limit for the light-quark momenta in energetic heavy-hadron decays.

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Author information

Authors and Affiliations

  1. Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, U.K.

    Guido Bell

  2. Theoretische Elementarteilchenphysik, Universität Siegen, Siegen, Germany

    Thorsten Feldmann

  3. Institut für Theoretische Physik E, RWTH Aachen, Aachen, Germany

    Yu-Ming Wang

  4. Physik Department T31, Technische Universität München, Garching, Germany

    Yu-Ming Wang

  5. Institute for Particle Physics Phenomenology, Durham University, Durham, U.K.

    Matthew W.Y. Yip

Authors
  1. Guido Bell
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  2. Thorsten Feldmann
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  3. Yu-Ming Wang
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  4. Matthew W.Y. Yip
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Correspondence to Thorsten Feldmann.

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ArXiv ePrint: 1308.6114

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Bell, G., Feldmann, T., Wang, YM. et al. Light-cone distribution amplitudes for heavy-quark hadrons. J. High Energ. Phys. 2013, 191 (2013). https://doi.org/10.1007/JHEP11(2013)191

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