ppInteractions at 303 GeV/c; Inclusive Measurement ofΔ++(1236)Resonance Production

Abstract

We have observed substantial ${\Delta }^{++}\mathrm{}\left(1236\right)\mathrm{}$ production in the inclusive reaction $p+p\to {\Delta }^{++}+\mathrm{everthing}$ at 303 GeV/c ($\sqrt{s}=23.9\mathrm{}$ GeV). This process with $t_{p,\Delta }<1.0\mathrm{}$ Ge${\mathrm{V}}^2$ accounts for ∼14% of the total $\mathrm{pp}$ inelastic cross section. The mean invariant mass of "everything" is ∼11 GeV, which implies that the ${\Delta }^{++}$ is usually part of a higher-multiplicity system moving in its hemisphere. The distribution in squared transverse momentum to the ${\Delta }^{++}$ falls off exponentially with a slope of about 12 Ge${\mathrm{V}}^2$.