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arXiv · 0709.2439

Soft-photon corrections in multi-body meson decays

Gino Isidori
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Abstract

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.

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Gino Isidori. 2007-12-06. Soft-photon corrections in multi-body meson decays. https://doi.org/10.1140/epjc%2Fs10052-007-0487-0

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