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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gluon propagator and three-gluon vertex with dynamical quarks

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Author(s):
Aguilar, A. C. [1] ; De Soto, F. [2] ; Ferreira, M. N. [1] ; Papavassiliou, J. [3, 4, 5] ; Rodriguez-Quintero, J. [6] ; Zafeiropoulos, S. [7]
Total Authors: 6
Affiliation:
[1] Univ Campinas UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013 - Spain
[3] Univ Valencia, Dept Theoret Phys, E-46100 Valencia - Spain
[4] Univ Valencia, IFIC, E-46100 Valencia - Spain
[5] CSIC, Valencia 46100 - Spain
[6] Univ Huelva, Dept Integrated Sci, Huelva 21071 - Spain
[7] Univ Toulon & Var, Aix Marseille Univ, CNRS, CPT, Marseille - France
Total Affiliations: 7
Document type: Journal article
Source: EUROPEAN PHYSICAL JOURNAL C; v. 80, n. 2 FEB 20 2020.
Web of Science Citations: 0
Abstract

We present a detailed analysis of the kinetic and mass terms associated with the Landau gauge gluon propagator in the presence of dynamical quarks, and a comprehensive dynamical study of certain special kinematic limits of the three-gluon vertex. Our approach capitalizes on results from recent lattice simulations with (2+1) domain wall fermions, a novel nonlinear treatment of the gluon mass equation, and the nonperturbative reconstruction of the longitudinal three-gluon vertex from its fundamental Slavnov-Taylor identities. Particular emphasis is placed on the persistence of the suppression displayed by certain combinations of the vertex form factors at intermediate and low momenta, already known from numerous pure Yang-Mills studies. One of our central findings is that the inclusion of dynamical quarks moderates the intensity of this phenomenon only mildly, leaving the asymptotic low-momentum behavior unaltered, but displaces the characteristic ``zero crossing{''} deeper into the infrared region. In addition, the effect of the three-gluon vertex is explored at the level of the effective gauge coupling, whose size is considerably reduced with respect to its counterpart obtained from the ghost-gluon vertex. The main upshot of the above considerations is the further confirmation of the tightly interwoven dynamics between the two- and three-point sectors of QCD. (AU)

FAPESP's process: 17/05685-2 - Hadronic physics in high energy nuclear collisions
Grantee:Jun Takahashi
Support type: Research Projects - Thematic Grants