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Baryon electric dipole moments from strong CP violation

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arxiv 1210.5887 v3 pith:KU6DWLGZ submitted 2012-10-22 hep-ph hep-latnucl-th

Baryon electric dipole moments from strong CP violation

classification hep-ph hep-latnucl-th
keywords baryondipoleelectricmomentsorderconstantsdatafactors
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The electric dipole form factors and moments of the ground state baryons are calculated in chiral perturbation theory at next-to-leading order. We show that the baryon electric dipole form factors at this order depend only on two combinations of low-energy constants. We also derive various relations that are free of unknown low-energy constants. We use recent lattice QCD data to calculate all baryon EDMs. In particular, we find d_n = -2.9\pm 0.9 and d_p = 1.1\pm 1.1 in units of 10^{-16} e \theta_0 cm. Finite volume corrections to the moments are also worked out. We show that for a precision extraction from lattice QCD data, the next-to-leading order terms have to be accounted for.

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