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Author  |
Conigli, A.; Frison, J.; Saez, A. |
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Title |
fK/fπ in iso-symmetric QCD and the CKM matrix unitarity |
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Journal Article |
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Year |
2026 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
86 |
Issue |
5 |
Pages |
478 - 13pp |
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Abstract |
We present lattice results for fK/fπ in the iso-symmetric limit of pure QCD (isoQCD) with Nf=2+1 flavours, along with a determination of |Vus|/|Vud| and a study on the unitarity of the first row of the Cabibbo-Kobayashi-Maskawa (CKM) matrix after introducing strong isospin-breaking and QED effects. The results obtained are based on a combination of a Wilson unitary action and the mixed-action setup introduced in Bussone et al. (Hadronic physics from a Wilson fermion mixed-action approach: setup and scale setting. http://arxiv.org/abs/2510.20450; Eur Phys J C 84:506, 2024. http://arxiv.org/abs/2309.14154). The combination of the two regularisations enables a more precise control over the continuum-limit extrapolation. |
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Address |
[Conigli, Alessandro] Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, Mainz, Germany, Email: asaez@ific.uv.es |
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Publisher |
Springer |
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Language |
English |
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Original Title |
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Series Title |
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Series Volume |
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Edition |
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ISSN |
1434-6044 |
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Notes |
WOS:001757331100001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7216 |
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