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Neutron Electric Dipole Moment Induced by the Strangeness Revisited

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arxiv 1211.5228 v2 pith:235E6J6Q submitted 2012-11-22 hep-ph

Kaori Fuyuto , Junji Hisano , Natsumi Nagata This is my paper
classification hep-ph
keywords dipolemomentoperatorsstrangenesscalculationcontributioncp-violatingelectric
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We have revisited the calculation of the neutron electric dipole moment in the presence of the CP-violating operators up to dimension five based on the chiral perturbation theory. Especially, we focus on the contribution of strangeness content. In the calculation, we extract the nucleon matrix elements of scalar-type quark operators from the results of the lattice QCD simulations, while those of the dipole-type quark-gluon operators are evaluated by using the method of the QCD sum rules. As a result, it is found that although the strangeness quantity in nucleon is small, the contribution of the chromoelectric dipole moment of strange quark may be still sizable, and thus may offer a sensitive probe for the CP-violating interactions in physics beyond the Standard Model.

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Cited by 2 Pith papers

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  1. The Neutron Electric Dipole Moment from Lattice QCD using a Background Electric Field

    hep-lat 2026-07 conditional novelty 7.0 of 10

    Using background electric fields, local topological charge, and non-Hermitian GEVP, lattice QCD yields dn = -0.0050(4)stat(8)sys θ-bar e fm at the physical point.

  2. A strange contribution to the neutron EDM

    hep-ph 2025-06 conditional novelty 7.0 of 10

    Analytic estimates from large-Nc QCD, the chiral quark model, and next-to-leading-order chiral perturbation theory indicate the strange tensor charge in the neutron is of order 0.1 to 0.3 of the valence charges, contr...

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