Positron production at large transverse momenta in interaction of 70-GeV protons
Akimenko A. S. , Belousov V. I. , Blik A. M., Golovnya N. I., Kut'in V. M., Zelepukin S. A. , Makarov G. P. , Sergeev V. A. , Simonov Yu. N., Sugonyaev V. P.
We measured the positron content in the beam of secondary particles produced by interaction of a 70-GeV proton beam with Be and Cu targets. We show that at transverse momenta PL~2 GeV/c the relative yield of direct positrons is R0(e +/π + ) S 3 X 10 5.