First lattice calculation of radiative leptonic decay rates of pseudoscalar mesons

URN to cite this document:: urn:nbn:de:bvb:355-epub-454316
DOI to cite this document:: 10.5283/epub.45431

Desiderio, A. ; Frezzotti, R. ; Garofalo, M. ; Giusti, D. ; Hansen, M. ; Lubicz, V. ; Martinelli, G. ; Sachrajda, C. T. ; Sanfilippo, F. ; Simula, S. ; Tantalo, N.

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Date of publication of this fulltext: 01 Apr 2021 11:31

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Abstract

We present a nonperturbative lattice calculation of the form factors which contribute to the amplitudes for the radiative decays P -> l (v) over bar (l gamma), where P is a pseudoscalar meson and l is a charged lepton. Together with the nonperturbative determination of the corrections to the processes P -> l (v) over bar (l),= due to the exchange of a virtual photon, this allows accurate ...