Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/185660| Title: | Measurement of the CP-violating phase β in B0→J/ψπ+π- decays and limits on penguin effects |
| Author: | Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Ruiz, Hugo LHCb Collaboration |
| Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Hadrons Large Hadron Collider (France and Switzerland) Particle physics |
| Issue Date: | 6-Mar-2015 |
| Publisher: | Elsevier B.V. |
| Abstract: | Time-dependent CP violation is measured in the ( ) B 0 → J /ψπ +π − channel for each π +π − resonant final state using data collected with an integrated luminosity of 3.0 fb−1 in pp collisions using the LHCb detector. The final state with the largest rate, J /ψρ0(770), is used to measure the CP-violating angle 2βeff to be (41.7 ± 9.6+2.8 −6.3)◦. This result can be used to limit the size of penguin amplitude contributions to CP violation measurements in, for example, ( ) B 0 s → J /ψφ decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase φs is limited to be within the interval [−1.05◦, +1.18◦] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed |
| Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.physletb.2015.01.008 |
| It is part of: | Physics Letters B, 2015, vol. 742, p. 38-49 |
| URI: | http://hdl.handle.net/2445/185660 |
| Related resource: | https://doi.org/10.1016/j.physletb.2015.01.008 |
| ISSN: | 0370-2693 |
| Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 653709.pdf | 827.68 kB | Adobe PDF | View/Open |
This item is licensed under a
Creative Commons License
