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arXiv 1209.6306hep-phnucl-th
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从QCD $θ$项计算氘核的电偶极矩

The electric dipole moment of the deuteron from the QCD $θ$-term

J. Bsaisou, C. Hanhart, S. Liebig, U. -G. Meißner, A. Nogga, A. Wirzba

摘要:

在有效场论框架下计算了QCD $θ$项引起的双核子对氘核电偶极矩的贡献。特别是,我们发现的差异的氘核EDM和质子和中子EDM的总和引起的QCD $θ$ -长期的值$(-5.4\pm 3.9)\,\barθ\times 10^{-4}\, e$ FM。到目前为止,主要的不确定性来自CP和同位旋破坏的$πNN$耦合常数。

英文摘要:

The two-nucleon contributions to the electric dipole moment (EDM) of the deuteron, induced by the QCD $θ$-term, are calculated in the framework of effective field theory up-to-and-including next-to-next-to-leading order. In particular we find for the difference of the deuteron EDM and the sum of proton and neutron EDM induced by the QCD $θ$-term a value of $(-5.4\pm 3.9)\,\barθ\times 10^{-4}\, e$ fm. The by far dominant uncertainty comes from the CP- and isospin-violating $πNN$ coupling constant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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