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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2401.03720 |
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| _version_ | 1866909064791851008 |
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| author | Hao, Lei |
| author_facet | Hao, Lei |
| contents | The tree-level measurement of the CKM $γ$ angle is a crucial test of $CP$ violation in the Standard Model (SM). Discrepancies between direct measurements (tree-level decays) and indirect measurements (loop decays) could indicate physics beyond the SM. Recent measurements using decays such as $B^0 \rightarrow DK^{*0}, B^{\pm} \rightarrow [Dπ^0/γ]_{D^*}h^{\pm}$ (where $D$ decays to $K_{S}^{0} h^+h^-$ with $h=K, π$) and $B^{\pm} \rightarrow [h'^+h'^-π^+π^-]_Dh^{\pm}$ are presented. Additionally, the combination of previous $γ$ measurements at LHCb, excluding the aforementioned results, is also presented. The LHCb result, with a precision of $(63.8^{+3.5}_{-3.7})^{\circ}$ establishes itself as a dominant measurement in this field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_03720 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | CKM $γ$ measurements at LHCb Hao, Lei High Energy Physics - Experiment The tree-level measurement of the CKM $γ$ angle is a crucial test of $CP$ violation in the Standard Model (SM). Discrepancies between direct measurements (tree-level decays) and indirect measurements (loop decays) could indicate physics beyond the SM. Recent measurements using decays such as $B^0 \rightarrow DK^{*0}, B^{\pm} \rightarrow [Dπ^0/γ]_{D^*}h^{\pm}$ (where $D$ decays to $K_{S}^{0} h^+h^-$ with $h=K, π$) and $B^{\pm} \rightarrow [h'^+h'^-π^+π^-]_Dh^{\pm}$ are presented. Additionally, the combination of previous $γ$ measurements at LHCb, excluding the aforementioned results, is also presented. The LHCb result, with a precision of $(63.8^{+3.5}_{-3.7})^{\circ}$ establishes itself as a dominant measurement in this field. |
| title | CKM $γ$ measurements at LHCb |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2401.03720 |