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Q-balls, integrability and duality
Peter Bowcock, David Foster and Paul Sutcliffe 2009 J. Phys. A: Math. Theor. 42 085403 (22pp)   doi: 10.1088/1751-8113/42/8/085403

Phys. Lett. B (Netherlands) 154B (9 May 1985) 368-72

CP, R invariance and non-renormalization theorems in N=1 supergravity

I. Affleck and M. Dine
Joseph Henry Labs., Princeton Univ., NJ, USA

Abstract. N=1 supergravity models have new, CP violating phases which can give too large a neutron electric dipole moment. The authors show that, in large classes of models, these phases are naturally approximately 10-15 or approximately lambda 2/4 pi 2 (where lambda is a Yukawa coupling). This results from a connection between CP and R invariance, a novel consequence of non-renormalization theorems, and a general fermion-boson mass relation

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