Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/186474
Title: | Search for CP violation in the phase space of D0 → π+π-π+π- decays |
Author: | Camboni, Alessandro Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, E. Rives Molina, V. Alfonso Albero, Alejandro Calvo Gomez, M. Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | Jun-2017 |
Publisher: | Elsevier B.V. |
Abstract: | A search for time-integrated CP violation in the Cabibbo-suppressed decay D0 →π+π-π+π- is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, for the first time, is extended to probe the P-odd case. Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb-1 collected by the LHCb detector at centre-of-mass energies of √{ s} = 7 TeV and 8 TeV, the world's best sensitivity to CP violation in this decay is obtained. The data are found to be consistent with the hypothesis of CP symmetry with a p-value of (4.6 ± 0.5)% in the P-even case, and marginally consistent with a p-value of (0.6 ± 0.2)% in the P-odd case, corresponding to a significance for CP non-conservation of 2.7 standard deviations. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.physletb.2017.03.062 |
It is part of: | Physics Letters B, 2017, vol. 769, p. 345-356 |
URI: | http://hdl.handle.net/2445/186474 |
Related resource: | https://doi.org/10.1016/j.physletb.2017.03.062 |
ISSN: | 0370-2693 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
678003.pdf | 1.32 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License