期刊
PHYSICAL REVIEW D
卷 78, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.012001
关键词
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资金
- National Science Foundation
- U. S. Department of Energy
- Natural Sciences and Engineering Research Council of Canada
- Science and Technology Facilities Council [PPA/A/S/2003/00461/2, PP/E002722/1, PP/F000650/1, ST/G502412/1] Funding Source: researchfish
- STFC [PP/F000650/1, ST/G502412/1, PP/E002722/1] Funding Source: UKRI
We exploit the quantum coherence between pair-produced D-0 and (D) over bar (0) in psi(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase delta between doubly Cabibbo-suppressed D-0 -> K+pi(-) and Cabibbo-favored (D) over bar (0)-> K+pi(-). We analyze a sample of 1.0 x 10(6) D-0(D) over bar (0) pairs from 281 pb(-1) of e(+)e(-) collision data collected with the CLEO-c detector at E-cm=3.77 GeV. By combining CLEO-c measurements with branching fraction input and time-integrated measurements of R-M equivalent to (x(2)+y(2))/2 and R-WS equivalent to Gamma(D-0 -> K+pi(-))/Gamma((D) over bar (0)-> K+pi(-)) from other experiments, we find cos delta = 1.03(-0.17)(+0.31) +/- 0.06, where the uncertainties are statistical and systematic, respectively. In addition, by further including external measurements of charm mixing parameters, we obtain an alternate measurement of cos delta = 1.10 +/- 0.35 +/- 0.07, as well as xsin delta = (4.4(-1.8)(+2.7) +/- 2.9) x 10(-3) and delta = (22(-12-11)(+11+9))degrees.
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