New insights into the neutron electric dipole moment

Details New insights into the neutron electric dipole moment New insights into the neutron electric dipole moment

2009-11-20

arxiv.org/abs/0911.3981v2

Phys.Lett.B687:42-47,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 figures, version published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2010.03.005

We analyze the CP-violating electric dipole form factor of the nucleon in the framework of covariant baryon chiral perturbation theory. We give a new upper bound on the vacuum angle, |\theta_0| \lesssim 2.5 \cdot 10^{-10}. The quark mass dependence of the electric dipole moment is discussed and compared to lattice QCD data. We also perform the matching between its representations in the three- and two-flavor theories.

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