Photon-pair jet production via gluon fusion at the LHC

Abstract

Photon-pair direct or jet-associated productions are important for relevant standard model measurement, Higgs and new physics searches at the LHC. The loop-induced gluon-fusion process gg -> γγg, which although formally contributes only at the next-to-next-to-leading order to γγj productions, may get enhanced by the large gluon flux at the LHC. We have checked and confirmed previous results on gg -> γγ, γγg at one loop, using now the traditional Feynman diagram based approach and taking into account the quark mass effects, and further updated them for the 7 and 14 TeV LHC with new inputs and settings. We provide the details and results of the calculations, which involves manipulation of rank-5 pentagon integrals. Our results show that the gluon-fusion process can contribute about 10% of the Born result, especially at small M_{γγ} and PT_{γγ}, and increase further the overall scale uncertainty. Top quark loop effects are examined in detail, which shows importance near or above the threshold M_{γγ} \gsim 2m_t.

10 pages, 5 figures

References in corpus (5)

• Calculation of prompt diphoton production cross sections at Tevatron and LHC energies
• Search for Large Extra Dimensions in the Diphoton Final State at the Large Hadron Collider
• Next-to-Leading-Order Monte Carlo Simulation of Diphoton Production in Hadronic Collisions
• Feasibility of Searches for a Higgs Boson using H->WW->ll+MET and High PT Jets at the Tevatron
• SM Higgs boson searches in the early ATLAS data

Cited by in corpus (1)

• The top threshold effect in the $\gamma \gamma$ production at the LHC