期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.251801
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资金
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- Region Auvergne (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (Netherlands)
- NWO (Netherlands)
- SCSR (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- Rosatom (Russia)
- RFBR (Russia)
- NRC Kurchatov Institute (Russia)
- MinECo (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (U.S.A.)
- ERC
- IN2P3 (France)
- KIT (Germany)
- SURF (Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- STFC [ST/H001085/1, PP/E000355/1, ST/L003392/1, ST/L001195/1, ST/H001093/1, ST/H006737/1, ST/H001085/2, ST/K000705/1, ST/K00140X/1, ST/J005568/1, ST/H001069/2, ST/F007094/1, ST/K001361/1, ST/L003112/1, LHCb Upgrades, ST/I505572/1, LHCb, ST/J004332/1, ST/K502236/1, ST/K000748/1, ST/M001431/1, ST/H001093/2, ST/K003410/1, ST/H00081X/1, ST/K004646/1, ST/K00073X/1, ST/K00137X/1, ST/G005974/1, ST/K001604/1, ST/H00081X/2, PP/E000347/1, ST/H00100X/2, ST/L001144/1, ST/H00100X/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000347/1, ST/L003112/1, ST/H001093/1, ST/K001361/1, ST/K001604/1 CMS Upgrade, ST/K001604/1 SuperNEMO, ST/K001361/1 ATLAS, ST/H00081X/2, ST/K001604/1 LHCb, ST/L001195/1, ST/H00081X/1, ST/K001310/1 ATLAS, ST/K001604/1 T2K, ST/H001093/2, ST/K001604/1, ST/K001310/1 LHCb, ST/H00100X/1, PP/E000355/1, ST/K004646/1, ST/K001310/1 ATLAS Upgrades, ST/K00073X/1, ST/K001310/1, ST/K001604/1 MICE/UKNF, ST/L001144/1, ST/H00100X/2, ST/K001604/1 GRIDPP, ST/K001604/1 LHCb Upgrades, ST/K001604/1 DMUK, ST/K001310/1 LHCb Upgrades, ST/H006737/1, ST/K000705/1] Funding Source: researchfish
Measurements of charm mixing parameters from the decay-time-dependent ratio of D-0 -> K+ pi(-) to D-0 -> K-pi(+) 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) x 10(-5), y' = (4.8 +/- 1.0) x 10(-3), and R-D = (3.568 +/- 0.066) x 10(-3). Allowing for CP violation, the measurement is performed separately for D-0 and (D) over bar (0) mesons yielding A(D) = (-0.7 +/- 1.9)%, for the direct CP-violating asymmetry, and 0.75 < vertical bar q/p vertical bar<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.
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