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被引：0
|
作者：
Stamen, R [1 ]
机构：
[1] KEK, High Energy Res Org, Tsukuba, Ibaraki 3050801, Japan
来源：
ICHEP 2005: PROCEEDINGS OF THE 32ND INTERNATIONAL CONFERENCE HIGH ENERGY PHYSICS VOLS 1 AND 2 | 2005年
关键词：
D O I：
暂无
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The measurement of the partial rate asymmetries for various B -> K pi decay modes is presented. A significant asymmetry is measured for the decay mode B -> K+pi(-) with A(CP) = -0.101 +/- 0.025 +/- 0.005 which has a significance of 3.9 sigma and thus indicates evidence for direct CP violation. Furthermore the first observation of the decay mode B -> pi(0)pi(0) with a branching fraction of B(B -> pi(0)pi(0)) = 2.3(-0.5)(+0.4) +/- 0.2 x 10(-6) having a significance of 6.0 sigma is presented accompanied with the first measurement of the CP asymmetry in this mode.
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页码：1105 / 1108
页数：4
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