Isospin symmetry breaking effects in the pion and nucleon masses
  We investigate the electromagnetic mass splittings in the pseudoscalar meson and nucleon systems by combining 2+1 flavor domain wall fermion gauge configurations, generated by the RBC and UKQCD collaborations, and quenched, non-compact, lattice QED configurations. We analyze finite volume effects by using $16^3\times 32$ and $24^3\times 64$ lattices. 
Ran Zhou, Thomas Blum, Takumi Doi, Masashi Hayakawa, Taku Izubuchi,   Norikazu Yamada