The electric dipole form factor of the nucleon

Details The electric dipole form factor of the nucleon The electric dipole form factor of the nucleon

2005-08-04

arxiv.org/abs/nucl-th/0508012v1

Phys.Lett. B605 (2005) 273-278

Physics

Nuclear Physics

Nuclear Theory

8 pages, 2 figures

Scientific paper

10.1016/j.physletb.2004.11.043

The electric dipole form factor of the nucleon stemming from the QCD $\bar{\theta}$ term is calculated in chiral perturbation theory in leading order. To this order, the form factor originates from the pion cloud. Its momentum-dependence is proportional to a non-derivative time-reversal-violating pion-nucleon coupling, and the scale for momentum variation--appearing, in particular, in the radius of the form factor--is the pion mass.

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