Neutron Electric Dipole Moment at Fixed Topology

Details Neutron Electric Dipole Moment at Fixed Topology Neutron Electric Dipole Moment at Fixed Topology

2008-07-09

arxiv.org/abs/0807.1365v2

Mod.Phys.Lett.A24:1971,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, revised manuscript to be published

Scientific paper

We describe the finite volume effects of CP-odd quantities, such as the neutron electric dipole moment and the anapole moment in the $\theta$-vacuum, under different topological sectors. We evaluate the three-point Green's functions for the electromagnetic current in a fixed non-trivial topological sector in order to extract these CP-odd observables. We discuss the role of zero modes in the CP-odd Green's function and show that, in the quenched approximation, there is a power divergence in the quark mass for CP-odd quantities at finite volume.

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