Test of lepton flavor universality using B0 → D[bar][ast]-𝜏+𝜈𝜏 decays with hadronic 𝜏 channels
The branching fraction ℬ(𝐵0→𝐷*−𝜏+𝜈𝜏) is measured relative to that of the normalization mode 𝐵0 →𝐷*−𝜋+𝜋−𝜋+ using hadronic 𝜏+ →𝜋+𝜋−𝜋+(𝜋0)¯𝜈𝜏 decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
July 2023
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| In: |
Physical review
Year: 2023, Jahrgang: 108, Heft: 1, Pages: 012018-1-012018-18 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.108.012018 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.012018 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.012018 |
| Verfasserangaben: | R. Aaij et al.* (LHCb Collaboration) |
| Zusammenfassung: | The branching fraction ℬ(𝐵0→𝐷*−𝜏+𝜈𝜏) is measured relative to that of the normalization mode 𝐵0 →𝐷*−𝜋+𝜋−𝜋+ using hadronic 𝜏+ →𝜋+𝜋−𝜋+(𝜋0)¯𝜈𝜏 decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2 fb−1. The measured ratio is ℬ(𝐵0→𝐷*−𝜏+𝜈𝜏)/ℬ(𝐵0→𝐷*−𝜋+𝜋−𝜋+) =1.70 ±0.10+0.11−0.10, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the 𝐵0 →𝐷*−𝜋+𝜋−𝜋+ and 𝐵0 →𝐷*−𝜇+𝜈𝜇 modes, the lepton universality test ℛ(𝐷*−) ≡ℬ(𝐵0→𝐷*−𝜏+𝜈𝜏)/ℬ(𝐵0→𝐷*−𝜇+𝜈𝜇) is calculated, ℛ(𝐷*−)=0.247±0.015±0.015±0.012, where the third uncertainty is due to the uncertainties on the external branching fractions. This result is consistent with the Standard Model prediction and with previous measurements. |
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| Beschreibung: | Im Titel sind "0", [ast], die Plus- und Minuszeichen hochgestellt sowie tau bei nu tau tiefgestellt Im Titel ist [ast] als Tropfensternchen (englisch: teardrop-spoked asterisk) dargestellt *LHCb Collaboration: R. Aaij, S. Bachmann, M. Borsato, R. Caspary, G. Frau, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, J. Marks, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1048 weitere Personen] Veröffentlicht: 27. Juli 2023 Gesehen am 12.05.2025 |
| Beschreibung: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.108.012018 |