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arXiv 1204.2653hep-ph
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用QCD求和规则重新计算中子电偶极矩

Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules

Junji Hisano, Jeong Yong Lee, Natsumi Nagata, Yasuhiro Shimizu

摘要:

我们利用QCD求和规则研究了直到5维的CP破坏算符存在下的中子电偶极矩。结果表明,当采用特定的中子插值场时,OPE计算是稳健的,但在唯象方面存在一些不确定性。通过使用从格点计算得到的输入参数,我们得到了一个保守的限制CP破坏运营商的贡献。我们还显示了详细的推导的总和规则。

英文摘要:

We study the neutron electric dipole moment in the presence of the CP-violating operators up to the dimension five in terms of the QCD sum rules. It is found that the OPE calculation is robust when exploiting a particular interpolating field for neutron, while there exist some uncertainties on the phenomenological side. By using input parameters obtained from the lattice calculation, we derive a conservative limit for the contributions of the CP violating operators. We also show the detail of the derivation of the sum rules.

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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