Reevaluation of neutron electric dipole moment with QCD sum rules

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

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

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
Article number114044
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number11
DOIs
Publication statusPublished - 2012 Jun 26

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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