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http://hdl.handle.net/2445/185472
Title: | Updated determination of D 0 - D 0 mixing and C P violation parameters with D 0 → K + π - |
Author: | LHCb Collaboration Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni 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: | 2018 |
Publisher: | American Physical Society |
Abstract: | We report measurements of charm-mixing parameters based on the decay-time-dependent ratio of D0 → Kþπ− to D0 → K−πþ rates. The analysis uses a data sample of proton-proton collisions corresponding to an integrated luminosity of 5.0 fb−1 recorded by the LHCb experiment from 2011 through 2016. Assuming charge-parity (CP) symmetry, the mixing parameters are determined to be x02 ¼ ð3.9 2.7Þ × 10−5, y0 ¼ ð5.28 0.52Þ × 10−3, and RD ¼ ð3.454 0.031Þ × 10−3. Without this assumption, the measurement is performed separately for D0 and D¯ 0 mesons, yielding a direct CP-violating asymmetry AD ¼ ð−0.1 9.1Þ × 10−3, and magnitude of the ratio of mixing parameters 1.00 < jq/pj < 1.35 at the 68.3% confidence level. All results include statistical and systematic uncertainties and improve significantly upon previo |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.97.031101 |
It is part of: | Physical Review D, 2018, vol. 97, num. 3, p. 031101 |
URI: | http://hdl.handle.net/2445/185472 |
Related resource: | https://doi.org/10.1103/PhysRevD.97.031101 |
ISSN: | 2470-0010 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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