Determining the Gluon Distributions in the Proton and Photon from Two-Jet Production at HERA
JR Forshaw, RG Roberts
Abstract
Two-jet production from the direct photon contribution at HERA is a sensitive measure of the small-x gluon in the proton. We propose measurements of ratios of the jet cross-sections which will clearly distinguish between gluons with or without singular behaviour at small x. Furthermore, we show that analogous ratio measurements for the resolved photon contribution provide a sensitive way of determining the gluon distribution in the photon.
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