Regular Article - Theoretical Physics
Chiral dynamics and S-wave contributions in decays
Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
2 Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425, Jülich, Germany
3 Tbilisi State University, 0186, Tbilisi, Georgia
Accepted: 2 May 2021
Published online: 11 May 2021
In this work, we analyze the semi-leptonic decays within light-cone sum rules. The two and three-body light-cone distribution amplitudes (LCDAs) of the B meson and the only available two-body LCDA of the D meson are used. To include the finite-width effect of the , we use a scalar form factor to describe the final-state interaction between the mesons, which was previously calculated within unitarized Chiral Perturbation Theory. The result for the decay branching fraction of the decay is in good agreement with that measured by the BESIII Collaboration, while the branching fraction of the decay can be tested in future experiments.
© The Author(s) 2021
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