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arXiv · hep-ph/9904483

Theta-Induced Electric Dipole Moment of the Neutron via QCD Sum Rules

M. Pospelov·A. Ritz
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Abstract

Using the QCD sum rule approach, we calculate the electric dipole moment of the neutron induced by a vacuum theta--angle to approximately 40-50% precision, d_n = 2.4 x 10^{-16} θe.cm. Combined with the new experimental bound, this translates into the limit |θ|< 3 x 10^{-10}.

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M. Pospelov, A. Ritz. 2005-04-26. Theta-Induced Electric Dipole Moment of the Neutron via QCD Sum Rules. https://doi.org/10.1103/physrevlett.83.2526

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