Measurements of indirect CP asymmetries in D0 ? K- K+ and D0 ? p- p+ decays.

Measurements of indirect CP asymmetries in D0 ? K- K+ and D0 ? p- p+ decays.
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D0 中间接 CP 不对称性的测量?

DOI:
10.1103/physrevlett.112.041801
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发表时间:
2014
影响因子:
8.6
通讯作者:
Aaij R
Aaij R
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Aaij R

文献摘要

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本文利用LHCb探测器在质心能量为7 TeV时收集的对应于积分光度的碰撞数据样本,通过确定参数来研究介子的间接破坏。这个参数是在和D <$0介子衰变到本征态和的过程中测得的有效寿命的不对称性。拟合数据样本得到AΓ(KK)=(−0.35±0.62±0.12)×10−3和,其中第一个不确定度是统计的,第二个是系统的。这些结果代表了世界上对这些数量的最佳测量。它们显示两种最终状态之间没有区别,也没有违反的迹象。
A study of indirectviolation inmesons through the determination of the parameteris presented using a data sample ofcollisions, corresponding to an integrated luminosity of, collected with the LHCb detector and recorded at the center-of-mass energy of 7 TeV at the LHC. The parameteris the asymmetry of the effective lifetimes measured in decays ofand D¯​0 mesons to theeigenstatesand. Fits to the data sample yield AΓ(KK)=(−0.35±0.62±0.12)×10−3 and, where the first uncertainties are statistical and the second systematic. The results represent the world’s best measurements of these quantities. They show no difference inbetween the two final states and no indication ofviolation.