Carolina Bolognani
Constraining |V cs | and physics beyond the Standard Model from exclusive (semi)leptonic charm decays
Bolognani, Carolina; Reboud, Méril; van Dyk, Danny; Vos, K. Keri
Authors
Abstract
We study the available data on exclusive leptonic and semileptonic c → sℓ+ν decays within the Standard Model and beyond. Our analysis accounts for theory correlations between the relevant hadronic matrix elements through application of dispersive bounds. We find that, within a global analysis, the dispersive bounds are generally well respected and only mildly affect the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vcs|. Assuming Standard Model dynamics, we obtainVcs=0.957±0.003, which is compatible with the HFLAV/PDG reference value |Vcs| = 0.975 ± 0.006 at the 2.7σ level. Our findings lead to significant deficits in the second-row and second-column unitarity relations of the CKM matrix. Allowing for beyond the SM contributions in the Weak Effective Theory, we find very strong constraints on potential (pseudo)scalar and tensor effects. However, the data still permits sizeable CP-violating right-handed currents.
Citation
Bolognani, C., Reboud, M., van Dyk, D., & Vos, K. K. (2024). Constraining |V cs | and physics beyond the Standard Model from exclusive (semi)leptonic charm decays. Journal of High Energy Physics, 2024(9), Article 99. https://doi.org/10.1007/jhep09%282024%29099
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 30, 2024 |
Online Publication Date | Sep 18, 2024 |
Publication Date | 2024-09 |
Deposit Date | Oct 4, 2024 |
Publicly Available Date | Oct 4, 2024 |
Journal | Journal of High Energy Physics |
Print ISSN | 1126-6708 |
Electronic ISSN | 1029-8479 |
Publisher | Scuola Internazionale Superiore di Studi Avanzati (SISSA) |
Peer Reviewed | Peer Reviewed |
Volume | 2024 |
Issue | 9 |
Article Number | 99 |
DOI | https://doi.org/10.1007/jhep09%282024%29099 |
Keywords | CKM Parameters, Semi-Leptonic Decays |
Public URL | https://durham-repository.worktribe.com/output/2890550 |
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
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