Semileptonic $$D_{e4}$$ decays: hadronic dynamics and the determination of $$|V_{cs}|$$
Abstract
Abstract The four-body decays $$D^+ \rightarrow K^-\pi ^+e^+\nu _e$$ D + → K - π + e + ν e ( $$D_{e4}^+$$ D e 4 + ) and $$D^0\rightarrow \overline{K^0}\pi ^-e^+\nu _e$$ D 0 → K 0 ¯ π - e + ν e ( $$D^0_{e4}$$ D e 4 0 ) are studied in a model where the momentum-dependence of the hadronic matrix elements are described in terms of $$K^*(892)$$ K ∗ ( 892 ) and $$D^*(2010)$$ D ∗ ( 2010 ) pole contributions. From fits to the recent data of the BESIII collaboration we find that the $$D^*$$ D ∗ -pole can mimic the effect of the S -wave contribution of the $$K\pi $$ K π system to the branching fraction. Implications for the determination of the $$|V_{cs}|$$ | V cs | quark mixing matrix element are discussed.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Particle physics theoretical and experimental studies
Quantum and Classical Electrodynamics
Publication details
- Journal / source
- The European Physical Journal C
- Publisher
- Springer Science and Business Media LLC
- Volume
- 86
- Issue
- 7
- Publication date
- 14 July 2026
- Language
- EN