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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.06586 |
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| _version_ | 1866916794781925376 |
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| author | Santiago, J. L. Gutiérrez Castro, G. López |
| author_facet | Santiago, J. L. Gutiérrez Castro, G. López |
| contents | The four-body decays $D^+ \to K^-π^+e^+ν_e$ ($D_{e4}^+$) and $D^0\to \overline{K^0}π^-e^+ν_e$ ($D^0_{e4}$) are studied in a model where the momentum-dependence of the hadronic matrix elements are described in terms of $K^*(892)$ and $D^*(2010)$ pole contributions. From fits to the recent data of the BESIII collaboration we find that the $D^*$-pole can mimic the effect of the $S$-wave contribution of the $Kπ$ system, which has been suggested as an observational evidence for the light scalar strange resonance. Implications for the determination of the $|V_{cs}|$ quark mixing matrix element are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_06586 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Semileptonic $D_{e4}$ decays: hadronic dynamics and the determination of $|V_{cs}|$ Santiago, J. L. Gutiérrez Castro, G. López High Energy Physics - Phenomenology The four-body decays $D^+ \to K^-π^+e^+ν_e$ ($D_{e4}^+$) and $D^0\to \overline{K^0}π^-e^+ν_e$ ($D^0_{e4}$) are studied in a model where the momentum-dependence of the hadronic matrix elements are described in terms of $K^*(892)$ and $D^*(2010)$ pole contributions. From fits to the recent data of the BESIII collaboration we find that the $D^*$-pole can mimic the effect of the $S$-wave contribution of the $Kπ$ system, which has been suggested as an observational evidence for the light scalar strange resonance. Implications for the determination of the $|V_{cs}|$ quark mixing matrix element are discussed. |
| title | Semileptonic $D_{e4}$ decays: hadronic dynamics and the determination of $|V_{cs}|$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.06586 |