A search for direct electron production in pp interactions at 2.0 GeV/c - Rangaswamy, T.N.; Gurtu, A.; Malhotra, P.K.; Raghavan, R.; Subramanian, A.; Sudhakar, K.; Chapman, G.J.; Klein, A.G.; Mason, G.C.; Opat, G.I.; Wignall, J.W.G.; Tovey, S.N. (Elsevier)
A search for prompt electron production in pp annihilations from an exposure of 2 GeV/c p's in a bubble chamber with a track-sensitive target is presented. Subtracting the expected Dalitz decay of η and ω for pair masses m"e + "e - 〉 m"π0 we obtain 95% confidence level upper limits for the ratio R = N"e-N"π- = N"e + "e-N"π0 as 7 x 10^-^5.
http://linkinghub.elsevier.com/retrieve/pii/0550-3213(79)90427-9
Keywords: U