The electric dipole moment of the nucleon from simulations at imaginary vacuum angle theta

Details The electric dipole moment of the nucleon from simulations at imaginary vacuum angle theta The electric dipole moment of the nucleon from simulations at imaginary vacuum angle theta

2008-08-10

arxiv.org/abs/0808.1428v2

Physics

High Energy Physics

High Energy Physics - Lattice

22 pages, 10 figures

Scientific paper

We compute the electric dipole moment of proton and neutron from lattice QCD simulations with N_f=2 flavors of dynamical quarks at imaginary vacuum angle theta. The calculation proceeds via the CP odd form factor F_3. A novel feature of our calculation is that we use partially twisted boundary conditions to extract F_3 at zero momentum transfer. As a byproduct, we test the QCD vacuum at nonvanishing theta.

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