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题名: New prediction for the direct CP-violating parameter epsilon
作者: Wu, YL
刊名: PHYSICAL REVIEW D
出版日期: 2001
卷号: 64, 期号:1, 页码:-
关键词: ANOMALOUS DIMENSION MATRIX ;  WEAK NONLEPTONIC DECAYS ;  2-HIGGS-DOUBLET MODEL ;  K->PI-PI DECAYS ;  1/N-C EXPANSION ;  LEADING ORDER ;  EPSILON ;  EVOLUTION ;  ELEMENTS ;  ANATOMY
学科分类: Physics
通讯作者: Wu, YL , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The low-energy dynamics of QCD is investigated with special attention paid to the matching between QCD and chiral perturbation theory (ChPT), and also to some useful algebraic chiral operator relations which survive even when we include chiral loop corrections. It then allows us to evaluate the hadronic matrix elements below the energy scale Lambda (x) similar or equal to 1 GeV. Based on the new analyses, we present a consistent prediction for both the direct CP-violating parameter epsilon'/epsilon and the DeltaI=1/2 rule in kaon decays. In the leading 1/N-c approximation, the isospin amplitudes A(0) and A(2) are found to agree well with the data, and the direct CP-violating parameter epsilon'/epsilon is predicted to be large, which also confirms our earlier conclusion. Its numerical value is epsilon'/epsilon = 23.6(-7.8)(+12.4) x 10(-4)(Im lambda (t)/1.2 x 10(-4)) which is no longer sensitive to the strange quark mass due to the matching conditions. Taking into account a simultaneous consistent analysis on the isospin amplitudes A(0) and A(2) the ratio epsilon'/epsilon is in favor of the values epsilon'/epsilon = (20 +/- 9) x 10(-4).
收录类别: SCI
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12718
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Wu, YL. New prediction for the direct CP-violating parameter epsilon[J]. PHYSICAL REVIEW D,2001,64(1):-.
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