Hard photon production and matrix-element parton-shower merging

Abstract

We present a Monte-Carlo approach to prompt-photon production, where photons and QCD partons are treated democratically. The photon fragmentation function is modelled by an interleaved QCD+QED parton shower. This known technique is improved by including higher-order real-emission matrix elements. To this end, we extend a recently proposed algorithm for merging matrix elements and truncated parton showers. We exemplify the quality of the Monte-Carlo predictions by comparing them to measurements of the photon fragmentation function at LEP and to measurements of prompt photon and diphoton production from the Tevatron experiments.

18 pages, 5 figures, revised version with minor updates

References in corpus (19)

• PYTHIA 6.4 Physics and Manual
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• NLO matrix elements and truncated showers
• QCD radiation in the production of heavy colored particles at the LHC
• Systematic event generator tuning for the LHC
• A new critical study of photon production in hadronic collisions
• Coherent Parton Showers with Local Recoils
• Soft Photon Radiation in Particle Decays in SHERPA
• Calculation of prompt diphoton production cross sections at Tevatron and LHC energies
• Measurement of the Inclusive Isolated Prompt Photon Cross Section in ppbar Collisions at sqrt{s} = 1.96 TeV using the CDF Detector
• Photon - Jet Correlations and Constraints on Fragmentation Functions
• All-orders resummation for diphoton production at hadron colliders
• Search for a Fermiophobic Higgs Boson Decaying into Diphotons in p p-bar Collisions at sqrt{s} = 1.96 TeV
• High-energy resummation in direct photon production
• Search for $h_f\to \gamma \gamma$ with the D0 detector at $\sqrt{s}=1.96$ TeV

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