RT Journal Article
T1 Nonperturbative four-gluon vertex in soft kinematics
A1 Aguilar, A.C.
A1 de Soto, Feliciano
A1 Ferreira, M.N.
A1 Papavassiliou, J.
A1 Pinto-Gómez, F.
A1 Rodríguez-Quintero, J.
A1 Santos, L.R.
K1 Quantum chromodynamics
K1 Four-gluon vertex
K1 Lattice QCD
K1 Schwinger-Dyson equations
AB 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.
PB ScienceDirect
YR 2024
FD 2024
LK https://hdl.handle.net/10433/22787
UL https://hdl.handle.net/10433/22787
LA en
NO Aguilar, A. C., De Soto, F., Ferreira, M. N., Papavassiliou, J., Pinto-Gómez, F., Rodríguez-Quintero, J., & Santos, L. R. (2024). Nonperturbative four-gluon vertex in soft kinematics. Physics Letters. B, 858, 139065-.
NO Departamento de Sistemas Físicos, Químicos y Naturales
DS RIO
RD Apr 23, 2026