We exploit the quantum coherence between pair-produced D0 and D0bar 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 δbetween D0 -> K+pi- and D0bar -> K+pi-. Using 281 pb^-1 of e^+e^- collision data collected with the CLEO-c detector at E_cm = 3.77 GeV, as well as branching fraction input and time-integrated measurements of R_M = (x^2+y^2)/2 and R_{WS} = Gamma(D0 -> K+pi-)/Gamma(D0bar -> K+pi-) from other experiments, we find \cosδ= 1.03 +0.31-0.17 +- 0.06, where the uncertainties are statistical and systematic, respectively. By further including other mixing parameter measurements, we obtain an alternate measurement of \cosδ= 1.10 +- 0.35 +- 0.07, as well as x\sinδ= (4.4 +2.7-1.8 +- 2.9) x 10^-3 and δ= 22 +11-12 +9-11 degrees.
First model-independent determination of the relative strong phase between D0 and D0B --> K0Spi+pi- and its impact on the CKM Angle gamma/phi3 measurement
利用Psi（3770）衰变中D 0和D 0 B对产生的量子相干性，首次确定了D 0-> K 0 Spi +pi-和D 0 B-> K 0 Spi +pi-之间相对较强的相位差，这对确定B-> D 0（D 0 B）K-衰变中CKM角γ/φ 3具有重要意义.使用CLEO-c探测器在Ecm = 3.77 GeV收集的818 1/pb的e+e-碰撞数据，我们采用了K 0 S pi+pi-和K 0 Lpi +pi-衰变反冲对味标记，CP标记和K 0 Spi +pi-标记事件的分箱Dalitz图分析，以确定这些强相位差。
Biases in the Determination of Correlations Between Underground Muon Flux and Atmospheric Temperature
School of Physics, Shandong University（山东大学物理学院）；Department of Physics and Astronomy, University of California, Irvine（加州大学尔湾分校物理与天文学系）；Jockey Club Institute for Advanced Study and Department of Physics, The Hong Kong University of Science and Technology（香港科技大学赛马会高级研究院及物理系）；Department of Physics, University of California, Berkeley（加州大学伯克利分校物理系）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Faculty of Mathematics and Physics, Charles University（查理大学数学与物理学院）
