2015/10/20 by Leandro Cieri, Cieri, Leandro
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1510.05950
13 pages, 6 figures. Invited talk to Conference. To appear in Proceedings of PHOTON 2015, Budker Institute of Nuclear Physics (BINP), Novosibirsk, Russia, from 15 to 19 June, 2015
arxiv created 2015/10/20 · openalex publication_date 2015/10/20 · arxiv updated 2015/10/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We are interested in the transverse-momentum (qT) distribution of a diphoton pair produced in hadron collisions. We resum the logarithmically-enhanced perturbative QCD contributions at small values of qT up to next-to-next-to-leading logarithmic accuracy. We consistently combine resummation with the known next-to-leading order perturbative result at intermediate and large values of qT . We include all perturbative terms up to order αS2 in our computation which, after integration over qT , reproduces the known next-to-next-to-leading order result for the diphoton pair production total cross section. A comparison with LHC data is presented. We estimate the perturbative accuracy of the theoretical calculation by performing the corresponding variation of scales. We anticipate that the effect of the transverse momentum resummation is not only to recover the predictivity of the calculation at small qT , but also to improve substantially the agreement with the experimental data.