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New prediction for the direct CP-violating parameter epsilon
Wu, YL; Wu, YL , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2001
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号64期号:1页码:-
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).
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
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
学科领域Physics
收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12718
专题理论物理所1978-2010年知识产出
通讯作者Wu, YL , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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GB/T 7714
Wu, YL,Wu, YL , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. New prediction for the direct CP-violating parameter epsilon[J]. PHYSICAL REVIEW D,2001,64(1):-.
APA Wu, YL,&Wu, YL , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2001).New prediction for the direct CP-violating parameter epsilon.PHYSICAL REVIEW D,64(1),-.
MLA Wu, YL,et al."New prediction for the direct CP-violating parameter epsilon".PHYSICAL REVIEW D 64.1(2001):-.
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