Global analysis of charm mixing parameters and determination of the CKM angle $γ$
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910965550809088 |
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| author | Betti, F. Bona, M. Ciuchini, M. Derkach, D. Di Palma, R. Kagan, A. L. Lubicz, V. Martinelli, G. Pierini, M. Silvestrini, L. Tarantino, C. Vagnoni, V. |
| author_facet | Betti, F. Bona, M. Ciuchini, M. Derkach, D. Di Palma, R. Kagan, A. L. Lubicz, V. Martinelli, G. Pierini, M. Silvestrini, L. Tarantino, C. Vagnoni, V. |
| contents | We present an updated global analysis of beauty decays sensitive to the angle $γ$ of the Cabibbo-Kobayashi-Maskawa matrix and of $D$-meson mixing data in the framework of approximate universality, in which CP violation in $D-\overline{D}$ mixing is described in terms of two universal weak phases corresponding to dispersive and absorptive contributions. We extract the fundamental theoretical parameters determining absorptive and dispersive contributions to $D$ meson mixing and CP violation, together with the angle $γ$. The results for the charm mixing parameters are $x_{12} \simeq x = (0.401 \pm 0.043)\%$ and $y_{12} \simeq y = (0.610 \pm 0.017)\%$, while the two CP-violating phases are given by $ϕ_2^M = (0.13 \pm 0.70)^{\circ}$ and $ϕ_2^Γ = (2.1 \pm 1.6)^{\circ}$. The angle $γ$ is found to be $γ= (65.7 \pm 2.5)^{\circ}$, in excellent agreement with the indirect determination from the Unitarity Triangle analysis. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_06449 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Global analysis of charm mixing parameters and determination of the CKM angle $γ$ Betti, F. Bona, M. Ciuchini, M. Derkach, D. Di Palma, R. Kagan, A. L. Lubicz, V. Martinelli, G. Pierini, M. Silvestrini, L. Tarantino, C. Vagnoni, V. High Energy Physics - Phenomenology High Energy Physics - Experiment We present an updated global analysis of beauty decays sensitive to the angle $γ$ of the Cabibbo-Kobayashi-Maskawa matrix and of $D$-meson mixing data in the framework of approximate universality, in which CP violation in $D-\overline{D}$ mixing is described in terms of two universal weak phases corresponding to dispersive and absorptive contributions. We extract the fundamental theoretical parameters determining absorptive and dispersive contributions to $D$ meson mixing and CP violation, together with the angle $γ$. The results for the charm mixing parameters are $x_{12} \simeq x = (0.401 \pm 0.043)\%$ and $y_{12} \simeq y = (0.610 \pm 0.017)\%$, while the two CP-violating phases are given by $ϕ_2^M = (0.13 \pm 0.70)^{\circ}$ and $ϕ_2^Γ = (2.1 \pm 1.6)^{\circ}$. The angle $γ$ is found to be $γ= (65.7 \pm 2.5)^{\circ}$, in excellent agreement with the indirect determination from the Unitarity Triangle analysis. |
| title | Global analysis of charm mixing parameters and determination of the CKM angle $γ$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2409.06449 |