Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.081803
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Funding
- DOE (U.S.)
- NSF (U.S.)
- NSERC (Canada)
- CEA (France)
- CNRS-IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- INFN (Italy)
- FOM (The Netherlands)
- NFR (Norway)
- MES (Russia)
- MICIIN (Spain)
- STFC (U.K.)
- European Union
- A.P. Sloan Foundation (U.S.)
- Binational Science Foundation (U.S.-Israel)
- Science and Technology Facilities Council [ST/H001166/1, PP/E000444/1, ST/H000992/1] Funding Source: researchfish
- STFC [ST/H001166/1, ST/H000992/1] Funding Source: UKRI
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We report a direct measurement of D-0-(D) over bar (0) mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D-0 -> K-S(0)pi(+)pi(-) and, for the first time, D-0 -> (KSK+K-)-K-0 decays. The low-momentum pion pi(+)(s) in the decay D*(+) -> D-0 pi(+)(s) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e(+)e(-) colliding-beam data recorded near root s = 10.6 by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 + 2.3(stat) +/- 1.2(syst) +/- 0.8(model)] X 10(-3), and y = [5.7 +/- 2.0(stat) +/- 1.3(syst) +/- 0.7(model)] X 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.
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