${}^{3}\mathrm{He}$ and $pd$ Scattering to Next-to-Leading Order in   Pionless Effective Field Theory
  We study the three-body systems of ${}^{3}\mathrm{He}$ and $pd$ scattering and demonstrate, both analytically and numerically, that a new $pd$ three-body force is needed at next-to-leading order in pionless effective field theory. We also show that at leading order these observables require no new three-body force beyond what is necessary to describe $nd$ scattering. We include electromagnetic effects by iterating only diagrams that involve a single photon exchange in the three-body sector. 
Jared Vanasse, David A. Egolf, John Kerin, Sebastian K\"onig and   Roxanne P. Springer
nucl-th