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arXiv 1207.2158hep-exhep-ph
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在CDF的D0 -> K+K-和D0 ->pi+pi-衰变中CP破坏不对称性差异的测量

Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF

CDF Collaboration

摘要:

我们报道了在费米实验室的对撞机探测器收集的质子-反质子碰撞的完整数据集中重建的D 0-> K+ K-和D 0-> pi+pi-衰变的时间积分CP-破坏不对称性之间的差异(Δ Acp)的测量,对应于积分亮度的9.7 fb-1。强衰变D*+-> D 0 π +被用来鉴别粲介子的产生是D 0还是反D 0。我们测量到Δ Acp = [-0.62 +-0.21(stat)+-0.10(syst)] %,它与零相差2.7个高斯标准差,这一结果支持了在质子-质子碰撞中得到的粲夸克衰变中CP破坏的类似证据。

英文摘要:

We report a measurement of the difference (Delta Acp) between time-integrated CP--violating asymmetries in D0-> K+ K- and D0-> pi+pi- decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb-1 of integrated luminosity. The strong decay D*+->D0 pi+ is used to identify the charm meson at production as D0 or anti-D0. We measure Delta Acp = [-0.62 +- 0.21 (stat) +- 0.10 (syst)] %, which differs from zero by 2.7 Gaussian standard deviations.This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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