Cover Image

Test of lepton flavor universality using B0 β†’ D[bar][ast]-𝜏+𝜈𝜏 decays with hadronic 𝜏 channels

The branching fraction ℬ⁑(𝐡0→𝐷*βˆ’β’πœ+⁒𝜈𝜏) is measured relative to that of the normalization mode 𝐡0 →𝐷*βˆ’β’πœ‹+β’πœ‹βˆ’β’πœ‹+ using hadronic 𝜏+ β†’πœ‹+β‘πœ‹βˆ’β‘πœ‹+⁑(πœ‹0)⁒¯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...

Full description

Saved in:
Bibliographic Details
Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Borsato, Martino (Author) , Caspary, Rowina (Author) , Frau, Giulia (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Marks, Jörg (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhao, Ya (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: July 2023
In: Physical review
Year: 2023, Volume: 108, Issue: 1, Pages: 012018-1-012018-18
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012018
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.108.012018
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.012018
Get full text
Author Notes:R. Aaij et al.* (LHCb Collaboration)
Description
Summary:The branching fraction ℬ⁑(𝐡0→𝐷*βˆ’β’πœ+⁒𝜈𝜏) is measured relative to that of the normalization mode 𝐡0 →𝐷*βˆ’β’πœ‹+β’πœ‹βˆ’β’πœ‹+ using hadronic 𝜏+ β†’πœ‹+β‘πœ‹βˆ’β‘πœ‹+⁑(πœ‹0)⁒¯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 fbβˆ’1. The measured ratio is ℬ⁑(𝐡0→𝐷*βˆ’β’πœ+⁒𝜈𝜏)/ℬ⁑(𝐡0→𝐷*βˆ’β’πœ‹+β’πœ‹βˆ’β’πœ‹+) =1.70 Β±0.1⁒0+0.11βˆ’0.10, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the 𝐡0 →𝐷*βˆ’β’πœ‹+β’πœ‹βˆ’β’πœ‹+ and 𝐡0 →𝐷*βˆ’β’πœ‡+β’πœˆπœ‡ modes, the lepton universality test ℛ⁑(𝐷*βˆ’) ≑ℬ⁑(𝐡0→𝐷*βˆ’β’πœ+⁒𝜈𝜏)/ℬ⁑(𝐡0→𝐷*βˆ’β’πœ‡+β’πœˆπœ‡) is calculated, ℛ⁑(𝐷*βˆ’)=0.247Β±0.015Β±0.015Β±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.
Item Description: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
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012018

Similar Items