Browsing by Author "Marcin, Martin Richard"

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    STUDY OF HIGH TRANSVERSE ENERGY PROCESSES IN 400 GEV PROTON-NUCLEUS COLLISIONS
    (1986) Marcin, Martin Richard
    Nuclear enhancement in high transverse energy hadron-nucleus scattering has intrigued the high energy physics community for a decade. The multiple scattering of the projectile and target constituents has been considered the cause of the enhancement. A study has been made of 400 GeV proton-nucleus collisions using a large acceptance calorimeter. The targets used were LH 2 , He, Be, C, Al, Cu, Sn and Pb. Two classes of geometrically unbiased triggers were utilized a large transverse energy, or global trigger and a trigger efficient at selecting jet events. It is found that the global events are dominated by a high multiplicity of low transverse momentum particles with a strongly enhanced A-dependence. The most jet-like events indicate that the naive dependence upon atomic number is approached.
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    Study of high transverse energy processes in 400 GeV proton-nucleus collisions
    (1989) Marcin, Martin Richard; Roberts, Jabus B.
    A study has been made of 400 GeV proton-nucleus collisions using a large acceptance calorimeter. The targets used were LH$\sb2$, He, Be, C, Al, Cu, Sn and Pb. A geometrically unbiased trigger efficient at selecting hadronic jet events was utilized. The A-dependence of the production of jet-like events is like that seen in high transverse momentum single- and di-hadron production. The dependence upon A of high E$\sb{\rm T}$ production is found to weaken with increasing planarity and when the observed event p$\sb{\rm T}$ balance improves. The flow of energy in the events is found to have a number of features in common with soft high-energy proton-nucleus collisions.