The limits on CP-odd four-fermion operators containing strange quark field

Details The limits on CP-odd four-fermion operators containing strange quark field The limits on CP-odd four-fermion operators containing strange quark field

1999-01-20

arxiv.org/abs/hep-ph/9901363v1

Phys.Rev. D60 (1999) 036003

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages. Standard Latex. 1 eps figure

Scientific paper

10.1103/PhysRevD.60.036003

The bounds on the neutron electric dipole moment and T-odd nucleon-nucleon interaction are used to extract the limits on the effective CP-odd four-fermion operators containing strange quark field. This completes the study of the dim=5,6 CP-odd operators built from the light-quark fields. The limits are very strong and comparable to those obtained previously for operators containing up and down flavors. We also analyze the shift of the axionic vacuum, $\theta_{eff}$, induced by four-fermion operators in the presence of PQ mechanism and conclude that this gives subleading contributions to CP-odd observables as compared with the direct ones.

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