CP violation in two-meson Tau decays induced by heavy new physics
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arXiv
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| Format: | Preprint |
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2024
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| author | Aguilar, Daniel A. López Rendón, Javier Roig, Pablo |
| author_facet | Aguilar, Daniel A. López Rendón, Javier Roig, Pablo |
| contents | We apply the effective field theory formalism that was used to study CP violation induced by heavy new physics in the $τ\to K_S πν_τ$ decays to the other two-meson tau decay channels. We focus on the rate and the forward-backward asymmetries, that are predicted using current bounds on the complex Wilson coefficients of the effective Lagrangian. We discuss our outcomes for the modes with $(K/π)π^0$ and $K K_S$, that can be studied at Belle-II and a super-tau-charm facility. Our main finding is that current and forthcoming experiments would be sensitive to the maximum allowed CP rate asymmetry in the $K^\pm K_S$ modes if a precision of $5\%$ is reached on this observable, that can check as well the BaBar anomaly in $K_Sπ$. For the $π^\pmπ^0$ channels, new physics would be difficult to probe at present. Disentangling new sources of CP violation would be most challenging in $K^\pmπ^0$ and the other modes. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_05588 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | CP violation in two-meson Tau decays induced by heavy new physics Aguilar, Daniel A. López Rendón, Javier Roig, Pablo High Energy Physics - Phenomenology High Energy Physics - Experiment We apply the effective field theory formalism that was used to study CP violation induced by heavy new physics in the $τ\to K_S πν_τ$ decays to the other two-meson tau decay channels. We focus on the rate and the forward-backward asymmetries, that are predicted using current bounds on the complex Wilson coefficients of the effective Lagrangian. We discuss our outcomes for the modes with $(K/π)π^0$ and $K K_S$, that can be studied at Belle-II and a super-tau-charm facility. Our main finding is that current and forthcoming experiments would be sensitive to the maximum allowed CP rate asymmetry in the $K^\pm K_S$ modes if a precision of $5\%$ is reached on this observable, that can check as well the BaBar anomaly in $K_Sπ$. For the $π^\pmπ^0$ channels, new physics would be difficult to probe at present. Disentangling new sources of CP violation would be most challenging in $K^\pmπ^0$ and the other modes. |
| title | CP violation in two-meson Tau decays induced by heavy new physics |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2409.05588 |