First Observation of D^{0}-D[over ¯]^{0} Oscillations in D^{0}?K^{+}p^{-}p^{+}p^{-} Decays and Measurement of the Associated Coherence Parameters.
First Observation of D^{0}-D[over ¯]^{0} Oscillations in D^{0}?K^{+}p^{-}p^{+}p^{-} Decays and Measurement of the Associated Coherence Parameters.
复制标题
第一次观察 D^{0}-D[over Ÿ]^{0} D^{0}?K^{ }p^{-}p^{ }p^{-} 衰减和测量
DOI：
10.1103/physrevlett.116.241801
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发表时间：
2016
影响因子：
8.6
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
利用LHCb实验记录的积分光度数据，在衰减率比随时间变化的分析中观察到了Charm介子振荡。测量结果对双Cabibbo抑制和Cabibbo有利振幅的相空间平均比以及相干因子和Charm混合参数的乘积很敏感。测量的约束是，这是迄今为止最精确的确定，并且为确定CP违反阶段提供了有用的输入，衰变。该分析还给出了分枝分数的最精确测量，并首次观测到在这种衰变模式下的-振荡，其显著意义为8.2标准差。
Charm meson oscillations are observed in a time-dependent analysis of the ratio oftodecay rates, using data corresponding to an integrated luminosity ofrecorded by the LHCb experiment. The measurements presented are sensitive to the phase-space averaged ratio of doubly Cabibbo-suppressed to Cabibbo-favored amplitudesand the product of the coherence factorand a charm mixing parameter. The constraints measured are, which is the most precise determination to date, and, which provides useful input for determinations of the CP-violating phasein,decays. The analysis also gives the most precise measurement of thebranching fraction, and the first observation of–oscillations in this decay mode, with a significance of 8.2 standard deviations.