CP violation in τ± → π± KSυ and D± → π± KS: the importance of KS-KL interference

被引：49
|
作者：
Grossman, Yuval [1 ]
Nir, Yosef [2 ]
机构：
[1] Cornell Univ, Inst High Energy Phenomenol, Newman Lab Elementary Particle Phys, Ithaca, NY 14853 USA
[2] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-76100 Rehovot, Israel
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 04期
基金：
以色列科学基金会;
关键词：
B-Physics; CP violation; DECAYS;
D O I：
10.1007/JHEP04(2012)002
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 B-factories have measured CP asymmetries in the tau -> pi K(S)v and D -> K-S pi modes. The K-S state is identified by its decay to two pions at a time that is close to the K-S lifetime. Within the Standard Model and many of its extensions, the asymmetries in these modes come from CP violation in K-0 - (K) over bar (0) mixing. We emphasize that the interference between the amplitudes of intermediate K-S and K-L is as important as the pure K-S amplitude. Consequently, the measured asymmetries depend on the times over which the relevant decay rates are integrated and on features of the experiment.
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页数：9
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