Cross section of isolated prompt photons in hadron-hadron collisions

By S. Catani, M. Fontannaz, J. Guillet, E. Pilon. 2002

216 citations recorded by the source corpus.

We consider the production of isolated prompt photons in hadronic collisions. We present a general discussion in QCD perturbation theory of the isolation criterion used by hadron collider experiments. The isolation criterion is implemented in a computer programme of the Monte Carlo type, which evaluates the production cross section at next-to-leading order accuracy in perturbative QCD. The calculation includes both the direct and the fragmentation components of the cross section, without any approximation of the dependence on the radius R of the isolation cone. We examine the scale dependence of the isolated cross section, the sensitivity of the cross section to the values of the isolation parameters, and we provide a quantitative comparison between the full R dependence and its small-R approximation.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d70c794745ead15930bc3294d58a1ab323f4f9a2

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In Nuclear and High Energy Physics

Citations in the corpus

Vector boson pair production at the LHC (2011, methodology): “Final state quark-photon collinear singularities are removed using a variant [6] of the Catani-Seymour dipole subtraction formalism [8].”
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, background): “four jets and Wplus ﬁve jets at the NLO [236–240]. NLO+PS merged samples for Wplus up to three jets are also available in SHERPA[241]. γplus up to three jets calculations have been presented in refs. [242,243]. We do not show cross sections for EW-induced V plus two jets processes with V = γ,Z,W±, w”
The Structure of the Proton in the LHC Precision Era (2017, methodology): “Theoretical calculations and tools For the past 15 years, the theoretical state–of–the–art was provided by the JETPHOX [360] MC generator, which implements both the direct and the fragmentation contributions consistently at NLO.”
Predictions for diphoton production at the LHC through NNLO in QCD (2016, methodology): “The next-to-leading order (NLO) calculations embodied in the Jetphox [18] and Diphox [19] Monte Carlo codes have been extensively utilized in the experimental literature.”
Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report (2014, background): “The following studies concern Monte Carlo integrators (as DIPHOX [486], JetFOX [487] or 2γNNLO [488], etc) for which the fragmentation component is a purely collinear phenomenon.”