High pT π0 production from αα and αp collisions at the CERN ISR

The invariant cross sections for π0 meson production in alpha-alpha and alpha-proton collisions at the ISR were meas- ured up to transverse momenta of 7 GeV c and 8 GeV c, respectively. These measurements are compared with π0 production in pp collisions at the same values of s/nucleon, and the variation of the nuclear A-dependence with pT is determined. © 1982

A comparison of the production of pi0 mesons in pp‾\overline{p} and pp interactions at the CERN ISR

A comparison of pp and pp interactions was made at \sqrt{s}=52.7 GeV at the CERN ISR. The quantities compared were the charged and neutral multiplicities, the total neutral transverse energy, Sigma E /sub T/, up to 12 GeV, and the single\pi^{0} inclusive cross section up to p/sub T/=5 GeV/c. No significant differences were observed

High pTπ0p_{T}\pi^{0} production from αα\alpha\alpha and αp\alpha p collisions at the CERN ISR

The invariant cross sections for\pi^{0} meson production in alpha- alpha and alpha-proton collisions at the ISR were measured up to transverse momenta of 7 GeV/c and 8 GeV/c, respectively. These measurements are compared with\pi^{0} production in pp collisions at the same values of \sqrt{s}/nucleon, and the variation of the nuclear A-dependence with p/sub T/ is determined

Three-jet events at the CERN intersecting storage rings

Three-jet events have been observed in pp collisions at s = 62.3 GeV. The data were collected using a total neutral energy trigger with a threshold at 25 GeV. These events appear predominantly as two jets, with some appearing as three jets. A novel analysis for the extraction of 2-jet and 3-jet events is described, and some of the event properties are discussed. The relative numbers of two- and three-jet events are studied within the framework of leading-order QCD, and yield a value of αs(K3/K2) = 0.19 ± 0.02 (stat.) ± 0.04 (syst.). © 1988