Compton scattering on the proton, neutron, and deuteron in chiral perturbation theory to O(Q^4)

S. R. Beane, M. Malheiro, J. A. McGovern +2

We study Compton scattering in systems with A=1 and 2 using chiral perturbation theory up to fourth order. For the proton we fit the two undetermined parameters in the O(Q^4) $\gamma$p…