Production of e+e- pairs in proton-deuteron capture to 3He
  The process p+d \leftrightarrow 3He + \gamma* at intermediate energies is described using a covariant and gauge-invariant model, and a realistic pd3He vertex. Both photodisintegration of 3He and proton-deuteron capture with production of e+e- pairs are studied, and results for cross sections and response functions are presented. The effect of time-like formfactors on the dilepton cross sections is investigated as well. 
A. Yu. Korchin, D. Van Neck, M. Waroquier, O. Scholten and A. E. L.   Dieperink