Nonperturbative four-gluon vertex in soft kinematics
Year: 2024
Type: article
Abstract: We present a nonperturbative study of the form factor associated with the projection of the full four-gluon vertex on its classical tensor, for a set of kinematics with one vanishing and three arbitrary external momenta. The treatment is based on the Schwinger-Dyson equation governing this vertex, and a large-volume lattice simulation, involving ten thousand gauge field configurations. The key hypothesis employed in both approaches is the “planar degeneracy”, which classifies diverse configurations by means of a single variable, thus enabling their meaningful “averaging”. The results of both approaches show notable agreement, revealing a considerable suppression of the averaged form factor in the infrared. The deviations from the exact planar degeneracy are discussed in detail, and a supplementary variable is used to achieve a more accurate description. The effective charge defined through this special form factor is computed within both approaches, and the results obtained are in excellent agreement.
Source: Physics Letters B
Institutions: Universidade Estadual de Campinas (UNICAMP), Nanjing University, Universitat de València, GSI Helmholtz Centre for Heavy Ion Research, ExtreMe Matter Institute EMMI, Universidad Pablo de Olavide, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Universidad de Huelva
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: Banco Santander, National Natural Science Foundation of China, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Generalitat Valenciana, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministerio de Ciencia e Innovación, Emberi Eroforrások Minisztériuma, Instituto Nacional de Ciência e Tecnologia: Física Nuclear e Aplicações, GSI Helmholtzzentrum für Schwerionenforschung, Agencia Estatal de Investigación, ExtreMe Matter Institute, GSI Helmholtzzentrum für Schwerionenforschung
Awards: G1207375514, G137406443, G1518642398, G1759509370, G2088934560, G2185543607, G2436853696, G2530734026, G3395060891, G3544058882, G3571220020, G3588731312, G3845773533, G429285467, G5071833386, G5805502524, G5967556063, G7299807396, G7403142628, G7418193128, G7705497243, G792785609, G797411214, G8269025138, G8920660035, G948230370
OpenAlex ID: W4403281020