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Persistent URL http://purl.org/net/epubs/work/29598
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Record Id 29598
Title Charm in Dijet Photoproduction at HERA
Abstract The production of charm in dijet photoproduction events at HERA has been studied. Charm production from the interaction of low virtuality photons is sensitive to both the charm and gluon densities within the photon, while the observation of jets with high transverse energy enables the study of the hard sub-process kinematics directly. Jets are found using the KT algorithm, while charm is tagged by identifying tracks from the decay of D*+(2010) mesons via the D*+ --> D0pi+ --> (K-pi+) pi+ and change conjugate channels. The differential cross-section d rho (ep --> D*+ dijets + X)/dx photon OBS, where x photon OBS is the fraction of the photon energy contributing to the two jets with highest transverse energy, is presented for events with ET(jet 1,2) > 7,6GeV and PT(D*) > 3GeV. A significant contribution to the cross-section from resolved (x photon OBS < 0.75) processes is observed. Comparison with Leading order QCD Monte Carlo indicate that greater than 90% of the resolved cross-section results from events where the charm is produced within the photon. A preliminary NLO calculation using the massive scheme of Frixone et al lies below the data.
Organisation CCLRC
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Language English (EN)
Type Details URI(s) Local file(s) Year
Thesis RAL Theses RAL-TH-1999-005. PhD, UCL, 1999. 1999