Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Nonperturbative Ball-Chiu construction of the three-gluon vertex

Texto completo
Autor(es):
Aguilar, A. C. [1] ; Ferreira, M. N. [2, 3, 4, 1] ; Figueiredo, C. T. [2, 3, 4, 1] ; Papavassiliou, J. [2, 3, 4]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Valencia, Dept Theoret Phys, E-46100 Valencia - Spain
[3] Univ Valencia, IFIC, E-46100 Valencia - Spain
[4] CSIC, E-46100 Valencia - Spain
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 99, n. 9 MAY 10 2019.
Citações Web of Science: 2
Resumo

We present the detailed derivation of the longitudinal part of the three-gluon vertex from the Slavnov-Taylor identities that it satisfies, by means of a nonperturbative implementation of the Ball-Chiu construction; the latter, in its original form, involves the inverse gluon propagator, the ghost dressing function, and certain form factors of the ghost-gluon kernel. The main conceptual subtlety that renders this endeavor nontrivial is the infrared finiteness of the gluon propagator, and the resulting need to separate the vertex into two pieces, one that is intimately connected with the emergence of a gluonic mass scale, and one that satisfies the original set of Slavnov-Taylor identities, but with the inverse gluon propagator replaced by its ``kinetic{''} term. The longitudinal form factors obtained by this construction are presented for arbitrary Euclidean momenta, as well as special kinematic configurations, parametrized by a single momentum. A particularly preeminent feature of the components comprising the tree-level vertex is their considerable suppression for momenta below 1 GeV, and the appearance of the characteristic ``zero-crossing{''} in the vicinity of 100-200 MeV. Special combinations of the form factors derived with this method are compared with the results of recent large-volume lattice simulations, and are found to capture faithfully the rather complicated curves formed by the data. A similar comparison with results obtained from Schwinger-Dyson equations reveals a fair overall agreement, but with appreciable differences at intermediate energies. A variety of issues related to the distribution of the pole terms responsible for the gluon mass generation are discussed in detail, and their impact on the structure of the transverse parts is elucidated. In addition, a brief account of several theoretical and phenomenological possibilities involving these newly acquired results is presented. (AU)

Processo FAPESP: 18/09684-3 - Propriedades infravermelha da estrutura transversa do vértice quark-gluon
Beneficiário:Clara Teixeira Figueiredo
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
Processo FAPESP: 17/05685-2 - Física hadrônica em colisões nucleares de altas energias
Beneficiário:Jun Takahashi
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/11894-0 - Aspectos da geração de massa dinâmica dentro do formalismo das Equações de Schwinger-Dyson
Beneficiário:Clara Teixeira Figueiredo
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 17/07595-0 - Aspectos não-perturbativos das funções de Green da QCD
Beneficiário:Arlene Cristina Aguilar
Linha de fomento: Auxílio à Pesquisa - Regular