Reevaluation of neutron electric dipole moment with QCD sum rules

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

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Abstract

We study the neutron electric dipole moment in the presence of the CP-violating operators up to dimension five in terms of the QCD sum rules. It is found that the operator product expansion calculation is robust when exploiting a particular interpolating field for a 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.

Original languageEnglish (US)
Article number114044
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number11
DOIs
StatePublished - Jun 26 2012

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