Current algebra for CP violating strong interactions is investigated. In particular, the neutron electric dipole moment Dn is shown to behave as θmπ21nmπ2 for small pion mass mπ and CP violating parameter θ. This logarithm is explicitly calculable: it contributes 5.2×10-16θ cm to Dn. This result is somewhat larger than a previous O(mπ2) estimate based on the bag model.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics