Production cross sections of γγ-rays, electrons, and positrons in p–p collisions

Because the production cross sections of γγ rays, electrons, and positrons (e±) made in p–p collisions, σpp→γσpp→γ and σpp→e±σpp→e±, respectively, are kinematically equivalent with respect to the parent pion-production cross section σpp→πσpp→π, we obtain σpp→e±σpp→e± directly from the machine data on σpp→γσpp→γ. In Paper I (Sato et al., 2012 [1]), we give explicitly σpp→γσpp→γ, reproducing quite well the accelerator data with LHC, namely σpp→e±σpp→e± is applicable enough over the wide energy range from GeV to 20 PeV for projectile proton energy. We discuss in detail the relation between the cross sections, and present explicitly σpp→e±σpp→e± that are valid into the PeV electron energy.