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Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD

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Giusti, Davide ; Kane, Christopher F. ; Lehner, Christoph ; Meinel, Stefan ; Soni, Amarjit
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Date of publication of this fulltext: 09 Feb 2024 06:14


We present a study of lattice-QCD methods to determine the relevant hadronic form factors for radiative-leptonic decays of pseudoscalar mesons. We provide numerical results for D+s→ℓ+νγ. Our calculation is performed using a domain-wall action for all quark flavors and on a single RBC/UKQCD lattice gauge-field ensemble. The first part of the study is how to best control two sources of systematic ...


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