Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-09-13
JHEP 0510:079,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 7 figures
Scientific paper
10.1088/1126-6708/2005/10/079
We study predictions from perturbative Quantum Chromodynamics (QCD) for the process pp -> H -> gamma gamma + X. In particular, we compare fully differential calculations at next-to-leading (NLO) and next-to-next-to-leading order (NNLO) in the strong coupling constant to the results obtained with the MC@NLO Monte Carlo (MC) generator, which combines QCD matrix elements at NLO with a parton shower algorithm. Estimates for the systematic uncertainties in the various predictions due to the choice of the renormalization scale and the parton distribution functions are given for the inclusive and accepted cross sections and for the corresponding acceptance corrections, obtained after applying standard selection and acceptance cuts. Furthermore, we compare the distributions for the Higgs signal to those for the irreducible two-photon background, obtained with a NLO MC simulation.
Dissertori Guenther
Holzner Andre G.
Stoeckli Fabian
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