Measurement of 𝐶𝑃 violation in 𝐵0→ 𝜓(→ℓ+ℓ−)𝐾0 𝑆(→𝜋+𝜋−) decays
A measurement of time-dependent 𝐶𝑃 violation in the decays of 𝐵0 and ¯𝐵0 mesons to the final states 𝐽/𝜓(→𝜇+𝜇−)𝐾0𝑆, 𝜓(2𝑆)(→𝜇+𝜇−)𝐾0𝑆 and 𝐽/𝜓( →𝑒+𝑒−)𝐾0𝑆 with 𝐾0𝑆 →𝜋+𝜋− is presented. The data correspond to an integrated luminosity of 6 fb−1 collected at a center-of-mass energy of √𝑠 =13 TeV...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2024
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| In: |
Physical review letters
Year: 2024, Jahrgang: 132, Heft: 2, Pages: 1-12 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.132.021801 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.132.021801 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.132.021801 |
| Verfasserangaben: | R. Aaij et al. (LHCb Collaboration*) |
| Zusammenfassung: | A measurement of time-dependent 𝐶𝑃 violation in the decays of 𝐵0 and ¯𝐵0 mesons to the final states 𝐽/𝜓(→𝜇+𝜇−)𝐾0𝑆, 𝜓(2𝑆)(→𝜇+𝜇−)𝐾0𝑆 and 𝐽/𝜓( →𝑒+𝑒−)𝐾0𝑆 with 𝐾0𝑆 →𝜋+𝜋− is presented. The data correspond to an integrated luminosity of 6 fb−1 collected at a center-of-mass energy of √𝑠 =13 TeV with the LHCb detector. The 𝐶𝑃-violation parameters are measured to be 𝑆𝜓𝐾0𝑆=0.717±0.013(stat)±0.008(syst) and 𝐶𝜓𝐾0𝑆=0.008±0.012(stat)±0.003(syst). This measurement of 𝑆𝜓𝐾0𝑆 represents the most precise single measurement of the CKM angle 𝛽 to date and is more precise than the current world average. In addition, measurements of the 𝐶𝑃-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed. |
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| Beschreibung: | Gesehen am 30.06.2025 Veröffentlicht: 8. Januar 2024 *LHCb Collaboration: R. Aaij, S. Bachmann, M. Borsato, L. Carus, R. Caspary, C. Cocha Toapaxi, M. De Cian, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, P.R. Pais, G. Tuci, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1080 weitere Personen] Im Titel sind die Zahl 0 sowie die Plus- und Minuszeichen hochgestellt, der Buchstabe S ist tiefgestellt |
| Beschreibung: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.132.021801 |