CP violation measurements in three-body charmless B decays
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911818928095232 |
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| author | Falcao, Lucas |
| author_facet | Falcao, Lucas |
| contents | This study reports \textit{CP} asymmetry measurements in charmless three-body decays of \textit{B} mesons, both using the Run II data from proton-proton collisions at a center-of-mass energy of 13 $TeV$, collected by the LHCb detector from 2015 to 2018, with an integrated luminosity of 5.9 $fb^{-1}$. Significant \textit{CP} asymmetries are observed in $B^\pm \rightarrow π^\pm π^+ π^- $ and $B^\pm \rightarrow K^\pm K^+ K^- $ decays, while the previously observed asymmetry in $B^\pm \rightarrow π^\pm K^+ K^- $ decays is confirmed, and the \textit{CP} asymmetry of $B^\pm \rightarrow K^\pm π^+ π^- $ decays is found to be compatible with zero. Additionally, a new method is used to measure the \textit{CP} asymmetry in charmless $B \rightarrow PV$ decays, showing significant asymmetry in $B^\pm \rightarrow K^\pm π^+ π^- $ decays dominated by $ρ(770)$, representing the first observation of \textit{CP} violation in this process. Other decay channels show \textit{CP} asymmetries compatible with zero. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_19921 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | CP violation measurements in three-body charmless B decays Falcao, Lucas High Energy Physics - Experiment This study reports \textit{CP} asymmetry measurements in charmless three-body decays of \textit{B} mesons, both using the Run II data from proton-proton collisions at a center-of-mass energy of 13 $TeV$, collected by the LHCb detector from 2015 to 2018, with an integrated luminosity of 5.9 $fb^{-1}$. Significant \textit{CP} asymmetries are observed in $B^\pm \rightarrow π^\pm π^+ π^- $ and $B^\pm \rightarrow K^\pm K^+ K^- $ decays, while the previously observed asymmetry in $B^\pm \rightarrow π^\pm K^+ K^- $ decays is confirmed, and the \textit{CP} asymmetry of $B^\pm \rightarrow K^\pm π^+ π^- $ decays is found to be compatible with zero. Additionally, a new method is used to measure the \textit{CP} asymmetry in charmless $B \rightarrow PV$ decays, showing significant asymmetry in $B^\pm \rightarrow K^\pm π^+ π^- $ decays dominated by $ρ(770)$, representing the first observation of \textit{CP} violation in this process. Other decay channels show \textit{CP} asymmetries compatible with zero. |
| title | CP violation measurements in three-body charmless B decays |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2403.19921 |