Theta induced electric dipole moment of the neutron via QCD sum rules

Theta induced electric dipole moment of the neutron via QCD sum rules
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通过 QCD 求和规则 Theta 感应中子的电偶极矩

DOI:
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发表时间:
1999
期刊:
影响因子:
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通讯作者:
A. Ritz
A. Ritz
中科院分区:
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文献类型:
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作者:
M. Pospelov;A. Ritz

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用QCD求和规则方法计算了真空θ角引起的中子电偶极矩,精度约为40-50%,d_n = 2.4 × 10 ~(-16) 赫塔电子显微镜结合新的实验界限,这转化为极限| heta| < 3 x 10^{-10}。
Using the QCD sum rule approach, we calculate the electric dipole moment of the neutron induced by a vacuum theta--angle to approximately 40-50% precision, d_n = 2.4 x 10^{-16} heta e.cm. Combined with the new experimental bound, this translates into the limit | heta|< 3 x 10^{-10}.