Zobrazeno 1 - 10
of 26
pro vyhledávání: '"M. N. Ferreira"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 11, Pp 1-21 (2024)
Abstract In the present work we determine the eight form factors of the transversely-projected quark-gluon vertex in general kinematics, in the context of Landau-gauge QCD with two degenerate light dynamical quarks. The study is based on the set of S
Externí odkaz:
https://doaj.org/article/e41d2879942948adafa83ac7d1da3006
Autor:
M. N. Ferreira, J. Papavassiliou
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-25 (2024)
Abstract We present a novel implementation of the Schwinger mechanism in QCD, which fixes uniquely the scale of the effective gluon mass scale and streamlines considerably the procedure of multiplicative renormalization. The key advantage of this met
Externí odkaz:
https://doaj.org/article/f21b8da2a4e842d9bdf88d8ddf4eb09e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 7, Pp 1-27 (2024)
Abstract To date, the four-gluon vertex is the least explored component of the QCD Lagrangian, mainly due to the vast proliferation of Lorentz and color structures required for its description. In this work we present a nonperturbative study of this
Externí odkaz:
https://doaj.org/article/7012e111746344af944c0ed3d292b878
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-22 (2023)
Abstract The action of the Schwinger mechanism in pure Yang–Mills theories endows gluons with an effective mass, and, at the same time, induces a measurable displacement to the Ward identity satisfied by the three-gluon vertex. In the present work
Externí odkaz:
https://doaj.org/article/85c5468681d643eba16e0dcce163e8eb
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-20 (2023)
Abstract The implementation of the Schwinger mechanism endows gluons with a nonperturbative mass through the formation of special massless poles in the fundamental QCD vertices; due to their longitudinal character, these poles do not cause divergence
Externí odkaz:
https://doaj.org/article/0fc544a187ec441792338ba488f30826
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-20 (2023)
Abstract We present a detailed exploration of certain outstanding features of the transversely-projected three-gluon vertex, using the corresponding Schwinger–Dyson equation in conjunction with key results obtained from quenched lattice simulations
Externí odkaz:
https://doaj.org/article/0662bae675694a1e986be2edf06c79db
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 1, Pp 1-20 (2023)
Abstract The correlation functions of Yang–Mills theories formulated in the background field method satisfy linear Slavnov–Taylor identities, which are naive generalizations of simple tree level relations, with no deformations originating from th
Externí odkaz:
https://doaj.org/article/4cd50b05f1764be19d5819c9a457e505
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 11, Pp 1-15 (2022)
Abstract We study a special Schwinger–Dyson equation in the context of a pure SU(3) Yang–Mills theory, formulated in the background field method. Specifically, we consider the corresponding equation for the vertex that governs the interaction of
Externí odkaz:
https://doaj.org/article/42e4f447f81b4e2e8b540e4c44a46090
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 1, Pp 1-20 (2021)
Abstract We present a novel method for computing the nonperturbative kinetic term of the gluon propagator from an ordinary differential equation, whose derivation hinges on the central hypothesis that the regular part of the three-gluon vertex and th
Externí odkaz:
https://doaj.org/article/fde2d54ae6ca4e5dbcc30a76e59276b8
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 9, Pp 1-18 (2020)
Abstract For special kinematic configurations involving a single momentum scale, certain standard relations, originating from the Slavnov-Taylor identities of the theory, may be interpreted as ordinary differential equations for the “kinetic term
Externí odkaz:
https://doaj.org/article/f3bd9a76819a4747b138065b896f7446