Measurement of D-0-(D)over-bar(0) Mixing Parameters and Search for CP Violation Using D-0 -> K+ pi(-) Decays
- R. Aaijb(Author),
- B. Adevaa(Author),
- M. Adinolfiaj(Author),
- C. Adroverw(Author),
- A. Affolderr(Author),
- Z. Ajaltounih(Author)
- aUniversity of Santiago de Compostela,
- bNational Institute for Subatomic Physics,
- cPontifícia Universidade Católica do Rio de Janeiro,
- dIstituto Nazionale Di Fisica Nucleare,
- eAlikhanov Institute for Theoretical and Experimental Physics,
- fCERN
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Resumen
Measurements of charm mixing parameters from the decay-time-dependent ratio of D0→K +π - to D0→K -π + rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb -1 of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded by the LHCb experiment. In the limit of charge-parity (CP) symmetry, the mixing parameters are determined to be x ′2=(5.5±4.9) ×10 -5, y ′=(4.8±1.0)×10 -3, and R D=(3.568±0.066)×10 -3. Allowing for CP violation, the measurement is performed separately for D0 and D ̄0 mesons yielding A D=(-0.7±1.9)%, for the direct CP-violating asymmetry, and 0.75<|q/p|<1.24 at the 68.3% confidence level, for the parameter describing CP violation in mixing. This is the most precise determination of these parameters from a single experiment and shows no evidence for CP violation.
Información de Publicación
Tipo de resultado
Idioma original
EnglishNúmero de artículo
251801Revista (Volumen, Número de Edición)
Physical Review Letters (Volumen 111, Número 25)Hitos de publicación
- Published- 18/12/2013
Estado de publicación
ISSN
0031-9007ID de publicación externa
- Scopus: 84890731238
- WOS: 000328884000005
