Time-dependent $CP$ asymmetries in $D$ and $B$ decays

Time-dependent $CP$ asymmetries in $D$ and $B$ decays
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$D$ 和 $B$ 中随时间变化的 $CP$ 不对称性衰减

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
B. Meadows
B. Meadows
中科院分区:
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文献类型:
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作者:
A. Bevan;G. Inguglia;B. Meadows

文献摘要

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在粲衰变中测量随时间变化的CP不对称性可以提供对标准模型结构变化的独特见解。我们研究了一些不同的CP本征态衰变的D介子,并描述了一种方法,可用于测量随时间变化的CP不对称性在现有的和未来的实验,初步评估,基于统计考虑,他们的各种能力。在中性D介子的时间相关分析中观察到的任何不对称性都可能意味着新的物理学。我们讨论的测量进行直接和间接测试的魅力酉三角形和之间的关系,B_d酉三角形。 我们还强调,目前的实验界限DeltaGamma(B_d)转化为一个显着的系统不确定性的测量β从B到C-酒吧的衰变。
The measurement of time-dependent CP asymmetries in charm decays can provide a unique insight into the flavor changing structure of the Standard Model. We examine a number of different CP eigenstate decays of D mesons and describe a method that can be used to measure time-dependent CP asymmetries at existing and future experiments, with a preliminary assessment, based on statistical considerations, of their various capabilities. Any asymmetry observed in time-dependent analysis of neutral D mesons could signify new physics. We discuss the measurements required to perform direct and indirect tests of the charm unitarity triangle and the relationship between this and the B_d unitarity triangle. We also highlight that current experimental bounds on DeltaGamma(B_d) translate into a significant systematic uncertainty on the measurement of beta from b to c c-bar s decays.