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Reevaluation of neutron electric dipole moment with QCD sum rules

2012; American Physical Society; Volume: 85; Issue: 11 Linguagem: Inglês

10.1103/physrevd.85.114044

1550-7998

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

Atomic and Subatomic Physics Research

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.