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Estimates of rates and errors for measurements of direct-(gamma) and direct-(gamma) + jet production by polarized protons at RHIC

机译:RHIC极化质子测量直接(γ)和直接(γ)+射流产生的速率和误差估计

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摘要

Studies of inclusive direct-(gamma) production by pp interactions at RHIC energies were performed. Rates and the associated uncertainties on spin-spin observables for this process were computed for the planned PHENIX and STAR detectors at energies between (radical)s = 50 and 500 GeV. Also, rates were computed for direct-(gamma) + jet production for the STAR detector. The goal was to study the gluon spin distribution functions with such measurements. Recommendations concerning the electromagnetic calorimeter design and the need for an endcap calorimeter for STAR are made.

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