Light quark loops in $K^\pm \to π^\pm ν\barν$ from vector meson dominance and update on the Kaon Unitarity Triangle
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913474415689728 |
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| author | Lunghi, E. Soni, A. |
| author_facet | Lunghi, E. Soni, A. |
| contents | We use vector meson dominance to calculate non-perturbative contributions to the branching ratio of the rare decay $K^\pm \to π^\pm ν\bar ν$ stemming from matrix elements involving up-quark loops. The importance of this observable as well as of $K^0 \to π^0 l^+ l^-$ and of the direct CP violation parameter $ε_K^{\prime}$ is then discussed in the context of a Unitarity Triangle sqtudy based on Kaon sector observables only. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_11190 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Light quark loops in $K^\pm \to π^\pm ν\barν$ from vector meson dominance and update on the Kaon Unitarity Triangle Lunghi, E. Soni, A. High Energy Physics - Phenomenology High Energy Physics - Experiment We use vector meson dominance to calculate non-perturbative contributions to the branching ratio of the rare decay $K^\pm \to π^\pm ν\bar ν$ stemming from matrix elements involving up-quark loops. The importance of this observable as well as of $K^0 \to π^0 l^+ l^-$ and of the direct CP violation parameter $ε_K^{\prime}$ is then discussed in the context of a Unitarity Triangle sqtudy based on Kaon sector observables only. |
| title | Light quark loops in $K^\pm \to π^\pm ν\barν$ from vector meson dominance and update on the Kaon Unitarity Triangle |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2408.11190 |