QCD light-cone distribution amplitudes of heavy mesons from boosted HQET

Martin Beneke, Gael Finauri, K. Keri Vos, Yanbing Wei

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Light-cone distribution amplitudes (LCDAs) frequently arise in factorization theorems involving light and heavy mesons. The QCD LCDA for heavy mesons includes short-distance physics at energy scales of the heavy-quark mass. In this paper we achieve the separation of this perturbative scale from the purely hadronic effects by matching the QCD LCDA to the convolution of a perturbative function with the universal, quark-mass independent LCDA defined in heavy-quark effective theory. This factorization allows to resum potentially large logarithms between ΛQCD and mQ as well as between mQ and the scale Q of the hard process in the production of boosted heavy mesons at colliders. As an application we derive new theoretical predictions for the branching ratio of the decay W ± → B ± γ. Furthermore, we provide phenomenological models for the QCD LCDAs of both the B¯ and D mesons expressed as expansions in Gegenbauer polynomials.

Original languageEnglish
Article number66
JournalJournal of High Energy Physics
Volume2023
Issue number9
DOIs
StatePublished - Sep 2023

Keywords

  • Bottom Quarks
  • Effective Field Theories
  • Rare Decays
  • Resummation

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