Regular Article - Theoretical Physics
A theoretical analysis of the semileptonic decays and
Grup de Física Teòrica, Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
2 Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193, Barcelona, Spain
Accepted: 10 December 2020
Published online: 24 December 2020
A complete theoretical analysis of the C- conserving semileptonic decays and ( or ) is carried out within the framework of the Vector Meson Dominance (VMD) model. An existing phenomenological model is used to parametrise the VMD coupling constants and the associated numerical values are obtained from an optimisation fit to and radiative decays (, , and , , ). The decay widths and dilepton energy spectra for the two processes obtained using this approach are compared and found to be in good agreement with other results available in the published literature. Theoretical predictions for the four and decay widths and dilepton energy spectra are calculated and presented for the first time in this work.
© The Author(s) 2020. corrected publication 2021
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