Improved measurement of CP-violation in B → (c(c)over-bar)K(*)0 decays

被引：0
作者：
Lange, DJ [1 ]
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2005年 / 20卷 / 15期
关键词：
CP violation; B decays;
D O I：
10.1142/S0217751X05026881
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We present results on time-dependent CP asymmetries in neutral B decays. The amplitude of the CP asymmetry.. sin2 beta in the Standard Model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B-0 or (B) over bar (0) from its decay products. Using data collected by the BABAR detector at the PEP-H asymmetric-energy B Factory at SLAC, we measure sin2 beta = 0.722 +/- 0.040(stat) +/- 0.023(syst) and cos2 beta = 2.72(_0.79)(+050)(stat) +/- 0.27(syst), determining the sign of cos2 beta to be positive at 86% CL.
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页码：3522 / 3526
页数：5
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