Production of e+ e− pairs in proton-deuteron capture to He

Abstract

The process p + d ↔ 3 He + γ * at intermediate energies is described using a covariant and gauge-invariant model, and a realistic pd 3 He vertex. Both photodisintegration of 3 He 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 form factors on the dilepton cross sections is investigated as well. : 21.45.+v, 25.40.Lw, 25.20.Lj PACS