Virtual Photons in Low Energy pi-pi Scattering
arXiv:hep-ph/9709348 · doi:10.1016/S0550-3213(98)00044-3
Abstract
The low energy scattering of pions is investigated in the presence of electromagnetic interactions at leading order and at next-to-leading order for the amplitudes involving at most one pair of charged pions. The size of the electromagnetic corrections to the S-wave scattering lengths is found to be comparable to the size of the two loop strong interaction corrections.
Latex, 34 pages, 3 figures