Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
Metadatos
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Springer
Materia
Hadron-Hadron scattering (experiments) Photon production Proton-proton scattering QCD
Fecha
2021-11-22Referencia bibliográfica
The ATLAS collaboration... [et al.]. Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector. J. High Energ. Phys. 2021, 169 (2021). [https://doi.org/10.1007/JHEP11(2021)169]
Patrocinador
ANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada (NSERC); NRC, Canada Canada Foundation for Innovation; CERN; ANID, Chile; Chinese Academy of Sciences Ministry of Science and Technology, China National Natural Science Foundation of China (NSFC); Minciencias, Colombia; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government; DNRF, Denmark Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS) CEA-DRF/IRFU, France; SRNSFG, Georgia; Federal Ministry of Education & Research (BMBF) HGF, Germany Max Planck Society; GSRI, Greece; RGC, China Hong Kong SAR, China; Israel Science Foundation Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; Netherlands Organization for Scientific Research (NWO) Netherlands Government; RCN, Norway; MEiN, Poland; Portuguese Foundation for Science and Technology European Commission; MNE/IFA, Romania; JINR; Russian Federation NRC KI, Russian Federation; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia MIZS, Slovenia; DSI/NRF, South Africa; Spanish Government; SRC, Sweden Wallenberg Foundation, Sweden; SERI, Switzerland Swiss National Science Foundation (SNSF) Canton of Bern, Switzerland; Ministry of Science and Technology, Taiwan; Ministry of Energy & Natural Resources - Turkey; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada CANARIE, Canada Compute Canada, Canada CRC, Canada; COST, European Union European Research Council (ERC) ERDF, European Union Marie Sklodowska-Curie Actions, European Union Horizon 2020, European Union; French National Research Agency (ANR); German Research Foundation (DFG) Alexander von Humboldt Foundation; Herakleitos programme Aristeia programme European Commission Greek NSRF, Greece; BSF-NSF, Israel German-Israeli Foundation for Scientific Research and Development; Norwegian Financial Mechanism 2014-2021, Norway; NCN, Poland Polish National Agency for Academic Exchange (NAWA); La Caixa Banking Foundation, Spain CERCA Programme Generalitat de Catalunya, Spain GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Leverhulme Trust; Royal Society of London; Canton of Geneva, Switzerland; PROMETEO Programme Generalitat Valenciana, Spain; Thales GroupResumen
A measurement of prompt photon-pair production in proton-proton collisions at root s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb(-1). Events with two photons in the wellinstrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of p(T,gamma 1(2)) > 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leadingorder calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system.