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@INPROCEEDINGS{Giusti:1033651,
      author       = {Giusti, Davide},
      title        = {{S}tudy of radiative leptonic decays from first principles},
      school       = {CERN},
      reportid     = {FZJ-2024-06523},
      year         = {2024},
      abstract     = {In the region of hard photon energies, radiative leptonic
                      decays represent important probes of the internal structure
                      of hadrons. Moreover, radiative decays can provide
                      independent determinations of Cabibbo-Kobayashi-Maskawa
                      matrix elements with respect to purely leptonic or
                      semileptonic channels. Prospects for a precise determination
                      of leptonic decay rates with emission of a hard photon are
                      particularly interesting, especially for the decays of heavy
                      mesons for which currently only model-dependent predictions,
                      based on QCD factorization and sum rules, are available to
                      compare with existing experimental data. We present a
                      non-perturbative lattice calculation of the
                      structure-dependent form factors which contribute to the
                      amplitudes for the radiative decays $H \to \ell \nu_\ell
                      \gamma$, where H is a charged pseudoscalar meson. With
                      moderate statistics, thanks to the use of improved
                      estimators, we are able to provide rather precise,
                      first-principles results for the form factors in the full
                      kinematical (photon-energy) range. Our
                      continuum-extrapolated lattice determinations may then be
                      employed to compute the differential decay rate and the
                      corresponding branching fraction and make comparisons with
                      existing experimental data.},
      organization  = {Lattice Coffee Seminar, (Switzerland)},
      subtyp        = {Other},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / MUON - Lattice
                      determination of the muon's anomalous magnetic moment
                      (101054515)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(EU-Grant)101054515},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/1033651},
}