Jets Produced in π^-, π^+, and Proton Interactions at 200 GeV on Hydrogen and Aluminum Targets

This paper presents results from an experiment on the production of jets (groups of particles) with high p_⊥ produced in 200-GeV/c interactions. Results are presented on the comparison of jet cross sections on aluminum and hydrogen targets. The jet fragmentation distributions are also examined. Both the cross section and the jet structure are found to depend strongly on the beam and target types

Experimental Tests of Quantum Chromodynamics in High-p_⊥ Jet Production in 200-GeV/c Hadron-Proton Collisions

Data on inclusive jet production in the transverse-momentum (p_⊥) range 0-8 GeV/c for 200-GeV/c p, π^-, π^+, K^-, K^+, and p incident on a hydrogen target are presented. The jet cross section is fully corrected for losses and biases, and compared with the predictions of a model based on quantum chromodynamics. Both the absolute cross section and the inclusive charged-particle distributions inside and outside the jet are in qualitative agreement with the model

Observation of the Production of Jets of Particles at High Transverse Momentum and Comparison with Inclusive Single-Particle Reactions

Data are presented on production by 200-GeV/c hadrons incident on beryllium of both single particles and jets (groups of particles) with high p_T (transverse momentum). The experiment was performed in a wide-aperture multiparticle spectrometer at Fermilab. The jet and single-particle cross sections have a similar shape from p_T=3 to 5 GeV/c but the jet cross section is over two orders of magnitude larger. The distributions of charged-particle momenta show striking similarities to those observed in lepton-induced processes

Measurement of Forward Jets Produced in High-Transverse-Momentum Hadron-Proton Collisions

A measurement of charged-particle production is reported for the forward region in events triggered by high-transverse-momentum (p⊥) jets and single particles. The momentum distributions of forward-going particles are observed to scale in a simple p⊥-dependent longitudinal variable. Forward-going (beam) jets are observed to be tilted away from the original direction by an amount which agrees with muon-pair data when interpreted in a parton (quantum-chromodynamics) model

Production and Correlations of Charged Particles with High P_t in 200-Ge V/c π^±p, K^-p, and pp Collisions

Results are presented on the production of single charged particles with transverse momentum in the range of 0.8-4.5 GeV/c in π^±p, K^-p, and pp collisions at 200 GeV/c and on correlations between the trigger particle and particles with opposite azimuthal angle

Study of A_2 production in the reaction π^-p→K^0K^-p at 50, 100, and 175 GeV/c

The reaction π^-p→K^0K^-p has been measured from 50 to 175 GeV/c. The production characteristics of the A_2 have been analyzed. We find spin and t dependence similar to lower energies, but the cross section falls rapidly with energy. In a Regge description of π^-p→A_2^-p our data imply a rather small Pomeron-exchange component

Observations of the D and E mesons and possible three-kaon enhancements in pi-p→K0K±pi±X,K0K+K-X at 50 and 100 GeV/c

We present results from the study of multikaon final states in the reactions π-p→K0K±π∓X̃, K0K+K-X̃ at 50 and 100 GeV/c. Here X̃ is semi-inclusive, that is, a specific forward topology and an interaction registering in the counters surrounding the target are required. The D(1285) meson is seen in the δπ mode, while the E(1420) meson is observed in both the δπ and the K*K modes. In addition, there are two possible enhancements in the three-kaon final state. The first (M∼1840 MeV) is associated with the K0φ mode and is consistent with being the charmed D0. The second, a K* state (M=2003±14 MeV, Γ=87±43 MeV), decays into KA2

A STUDY OF ASSOCIATED PARTICLES AND 2ND-ORDER PROCESSES IN ELECTRON-PAIR PRODUCTION AT THE CERN INTERSECTING STORAGE-RINGS

The multiplicity of particles associated with electron pairs with mass greater than 11 GeV/c2 is found to increase with the transverse momentum pT of the electron pair. The associated particles are observed to recoil against the electron pair and compensate locally its transverse momentum. The data are compared with lower √s dimuon data using the scaling form: s2pT2(d3 σ/dy dpT2 dm2) = H (xT, y, τ). © 1984