Radiative leptonic decays on the lattice

Christopher Kane, Christoph Lehner, Stefan Meinel, Amarjit Soni

Research output: Contribution to journalConference articlepeer-review

Abstract

Adding a hard photon to the final state of a leptonic pseudoscalar-meson decay lifts the helicity suppression and can provide sensitivity to a larger set of operators in the weak effective Hamiltonian. Furthermore, radiative leptonic B decays at high photon energy are well suited to constrain the first inverse moment of the B-meson light-cone distribution amplitude, an important parameter in the theory of nonleptonic B decays. We demonstrate that the calculation of radiative leptonic decays is possible using Euclidean lattice QCD, and present preliminary numerical results for D+s → `+νγ and K → `νγ ¯.

Original languageEnglish (US)
Article number134
JournalProceedings of Science
Volume363
StatePublished - 2019
Event37th International Symposium on Lattice Field Theory, LATTICE 2019 - Wuhan, China
Duration: Jun 16 2019Jun 22 2019

ASJC Scopus subject areas

  • General

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