This approach offers the best chance for making quantitative predictions of the polarizabilities. T he neutron magnetic polarizability is unique in that it is relatively insensitive to the chirally singular terms of the chiral expansion. As such, it should be possible to test QCD via numerical simulations, without resorting to phenomenology for the values of the coefficients of the leading nonanalytic terms of the chiral expansion. We have established a formalism for extracting the polarizabilities of QCD vacuum ground states in the external field approach. Currently, we are considering various methods for introducing a small external magnetic field on a periodic lattice.
Experimental programs indicate that an investigation of electromagnetic polarizabilities is timely.
To the Research Interests Index Please send questions, comments or suggestions to Derek B. Leinweber .