N. Morgan

The role of double parton collisions in soft hadron interactions

Abstract We have examined charged multiplicities arising from p−p and p− p collisions over the range of center of mass energies, s , from 30 GeV to 1800 GeV. Results from Tevatron experiment E735 support the presence of double parton interactions. These processes can be seen to account for a large fraction of the increase in the non single diffraction inelastic cross section from energies of about 200 GeV to 1800 GeV.

Charged particle multiplicity correlations in pp̄ collisions at s=0.3−1.8 TeV

Abstract The correlations between charged particle multiplicitie produced in forward and backward pseudorapidity regions in pp interactions have been measured with a 240 element scintillator hodoscope. The correlation coefficient and the variance of the difference of multiplicities in the two pseudorapidity regions were deterermined for s =0.3−1.8 TeV . These results have been interpreted in terms of a cluster model of particle production.

Charged particle multiplicity correlations in

Abstract The correlations between charged particle multiplicitie produced in forward and backward pseudorapidity regions in pp interactions have been measured with a 240 element scintillator hodoscope. The correlation coefficient and the variance of the difference of multiplicities in the two pseudorapidity regions were deterermined for s =0.3−1.8 TeV . These results have been interpreted in terms of a cluster model of particle production.

p\bar{p}

Transverse momentum spectra of charged particles produced within the pseudo-rapidity range of η= − 0.36 to + 1.0 have been measured in pp collisions at √s=0.3, 0.54, 1.0, and 1.8 TeV. The spectra are presented as a function of event charged multiplicity within the range −3.25<η<3.25. We found that the slope in the low pt region is independent of center-of-mass energy and multiplicity while the slope at the high pt region shows a strong energy and multiplicity dependence.

collisions at

Abstract The construction and operation of a 2 m long cylindrical drift chamber used as a high-multiplicity charged-particle detector at the Fermilab Tevatron collider is presented. The chamber was constructed of low-mass carbon fibe-epoxy composite material and presents 0.014 interaction lengths of material to particles passing radially through it. A 24-layer “jet”-type drift cell was used which obtained a spatial resolution of 250 μm and a two-hit separation of 3 mm. The chamber reconstructed events containing more than 100 charged particles over approximately 3.4 units of pseudorapidity.

\sqrt{s}

AbstractFermilab experiment E735 located at the CO intersection region of the

Multiplicity dependence of transverse momentum spectra of centrally produced hadrons in pp collisions at 0.3, 0.54, 0.9, and 1.8 TeV center of mass energy

\sqrt s = 1.8

φ meson production from\(p\bar p\) collisions at\(\sqrt s = 1.8\) TeV

TeV