A search for new particles which might be produced by photons of energy up to 18 GeV is described. No new particles were found. Calculations of the Bethe-Heitler process are described which make it possible to state that this experiment would have detected non-strongly-interacting particles whose mass and lifetime lay in a definite range, did they exist.
No takes yet. Share an insight, caveat, or question.
Barna et al. (1968) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: