Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/185481
Title: | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
Author: | LHCb Collaboration Alfonso Albero, Alejandro Garcia Moreno, P. Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 2021 |
Publisher: | Springer Verlag |
Abstract: | A flavour-tagged time-dependent angular analysis of B0 s → J/ψφ decays is presented where the J/ψ meson is reconstructed through its decay to an e +e − pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1 . The CP-violating phase and lifetime parameters of the B0 s system are measured to be φs = 0.00 ± 0.28 ± 0.05 rad, ∆Γs = 0.115 ± 0.045 ± 0.011 ps−1 and Γs = 0.608 ± 0.018 ± 0.011 ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0 s → J/ψφ decay with an e +e − pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP10(2021)060 |
It is part of: | Journal of High Energy Physics, 2021, vol. 2021, p. 1-28 |
URI: | http://hdl.handle.net/2445/185481 |
Related resource: | https://doi.org/10.1007/JHEP10(2021)060 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
721069.pdf | 991.41 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License