Semileptonic kaon decays and the precise determination of $V_{us}$
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866913689569853440 |
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| author | Seng, Chien-Yeah |
| author_facet | Seng, Chien-Yeah |
| contents | I will give a brief overview of the Standard Model theory inputs needed for the precise determination of the Cabibbo-Kobayashi-Maskawa matrix element $V_{us}$ from semileptonic kaon decays, focusing on the long-distance electromagnetic corrections. I will then describe our recent effort to pin down this correction at sub-permille level, which further sharpens the so-called ``Cabibbo angle anomaly'', an interesting observation which may point towards new physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04721 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Semileptonic kaon decays and the precise determination of $V_{us}$ Seng, Chien-Yeah High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice I will give a brief overview of the Standard Model theory inputs needed for the precise determination of the Cabibbo-Kobayashi-Maskawa matrix element $V_{us}$ from semileptonic kaon decays, focusing on the long-distance electromagnetic corrections. I will then describe our recent effort to pin down this correction at sub-permille level, which further sharpens the so-called ``Cabibbo angle anomaly'', an interesting observation which may point towards new physics. |
| title | Semileptonic kaon decays and the precise determination of $V_{us}$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2502.04721 |