Soft-photon corrections in multi-body meson decays

Sep, 2007
8 pages
Published in:
  • Eur.Phys.J.C 53 (2008) 567-571
e-Print:

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Abstract: (arXiv)
The effects due to soft-photon emission (and the related virtual corrections) in multi-body decays of B, D, and K mesons are analysed. We present analytic expressions for the universal O(alpha) correction factors which can be applied to all multi-body decay modes where a tight soft-photon energy cut in the decaying-particle rest-frame is applied. All-order resummations valid in the limit of small and large velocities of the final-state particles are also discussed. The phenomenological implications of these correction factors in the distortion of Dalitz-plot distributions of K -> 3 pi decays are briefly analysed.
  • meson: hadronic decay
  • meson: multiple production
  • photon: emission
  • B: hadronic decay
  • D: hadronic decay
  • K: hadronic decay
  • meson: width
  • differential cross section: radiative correction
  • Dalitz plot
  • numerical calculations
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