Journal of High Energy Physics

, 2012:97

Baryon electric dipole moments from strong CP violation

Article

DOI: 10.1007/JHEP12(2012)097

Cite this article as:
Guo, FK. & Meißner, UG. J. High Energ. Phys. (2012) 2012: 97. doi:10.1007/JHEP12(2012)097

Abstract

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 dn = −2.9 ± 0.9 and dp = 1.1 ± 1.1 in units of 10−16e θ0 cm. Finite volume corrections to the electric dipole 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.

Keywords

Chiral LagrangiansLattice QCDCP violation

Copyright information

© SISSA, Trieste, Italy 2012

Authors and Affiliations

  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  2. 2.Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron PhysicsJARA-FAME and JARA-HPC, Forschungszentrum JülichJülichGermany