Determination of the sign of the decay width difference in the B(s)(0) system.
Determination of the sign of the decay width difference in the B(s)(0) system.
复制标题
确定 B(s)(0) 系统中衰减宽度差的符号。
DOI：
10.1103/physrevlett.108.241801
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发表时间：
2012
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
波与波幅值之间的干涉随共振周围区域的对而衰减，用于确定这些振幅之间的强相位差作为不变质量的函数的变化。结合我们的不对称测量结果，我们得出结论，质量本征态几乎比质量本征态更轻，衰变速度更快。这决定了衰减宽度差的符号为正。我们的结果还解决了过去测量中违背相位接近零而不是接近零的模糊性。这些结论与标准模型的预期是一致的。
The interference between the-wave and-wave amplitudes indecays with thepairs in the region around theresonance is used to determine the variation of the difference of the strong phase between these amplitudes as a function ofinvariant mass. Combined with the results from ourasymmetry measurement indecays, we conclude that themass eigenstate that is almostis lighter and decays faster than the mass eigenstate that is almost. This determines the sign of the decay width differenceto be positive. Our result also resolves the ambiguity in the past measurements of theviolating phaseto be close to zero rather than. These conclusions are in agreement with the standard model expectations.