Slow proton and Δ++ production in K+p interactions at 70 GeV/c

The inclusive inelastic processes K+p → pX+ and K+p → Δ++X0 are studied at an incident momentum of 70 GeV/c. The data comes from the Big European Bubble Chamber BEBC filled with hydrogen, exposed to an rf separated K+ beam at the CERN SPS accelerator. The inclusive cross section for protons with laboratory momentum psub(L)sub(A)sub(B) <= 1.2 GeV/c is equal to (6.1 +- 0.1) mb. Inclusive Δ++-production is studied for /tsub(p)sub(,)sub(Δ)/ smaller than 1.0(GeV/c)2. Comparisons are made with other K+p data and with pp data at 69 GeV/c. Evidence is found for Pomeron exchange at the beam vertex both for slow proton and Δ++-production as well as for the absorptive pion exchange at the (p,Δ++) vertex. (orig.)