Loop-Less Electric Dipole Moment of the Nucleon in the Standard Model

Details Loop-Less Electric Dipole Moment of the Nucleon in the Standard Model Loop-Less Electric Dipole Moment of the Nucleon in the Standard Model

2012-02-28

arxiv.org/abs/1202.6270v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

We point out that the electric dipole moment of the neutron in the Standard Model is generated already at tree level to the second order in the weak interactions due to bound-state effects, without short-distance Penguin loops. The related contribution has a regular nonvanishing chiral limit and does not depend on the mass splitting between s and d quarks. We estimate it to be roughly 10^(-31)e*cm and expect a more accurate evaluation in the future. We comment on the connection between d_n and the direct CP-violation in D decays.

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