Charm production and charm pair correlations in 800 GeV/c proton-emulsion interactions

Charm production results from the 1985 data run of E653 are presented and compared with previously published measurements. The total inclusive charm cross section and differential cross section in Xf and P2t are discussed. Fits to dσ/dXfdPt2∼(1-Xf)n. e-bPt2 yields a value of n = 11 ± 2.0 and b=1.1±0.2(GeV/c)-2. Productions results from a sample of 47 charm pair events are presented, including the Xf, Pt2, mass and azimuthal opening angle distributions. Correlations within the charm pair sample are discussed (Data)