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Direct photon production at HERA, the Tevatron and the LHC

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arxiv 0809.0846 v2 pith:RG5A5ELA submitted 2008-09-04 hep-ph

Direct photon production at HERA, the Tevatron and the LHC

classification hep-ph
keywords discussedherameasurementstevatronuncertaintieswellapproachescarlo
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We review several most recent prompt-photon measurements at HERA and the Tevatron and discuss their implication for future measurements at the LHC. A comparison to Monte Carlo models, as well as to NLO QCD predictions based on the standard DGLAP and the kT-factorization approaches is discussed. Effects from renormalization and factorization scale uncertainties, as well as uncertainties on the gluon density distribution inside a proton are discussed.

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