Gluon-ghost vertex and kernel in the Background Field Method
The quark-ghost scattering kernel at one-loop dressed approximation
Effects of divergent ghost loops in the presence of dynamical quarks
| Full text | |
| Author(s): |
Aguilar, A. C.
[1]
;
Ambrosio, C. O.
[1]
;
De Soto, F.
[2]
;
Ferreira, M. N.
[1]
;
Oliveira, B. M.
[1]
;
Papavassiliou, J.
[3, 4, 5]
;
Rodriguez-Quintero, J.
[6]
Total Authors: 7
|
| Affiliation: | [1] Univ Campinas UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Pablo 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, E-46100 Valencia - Spain
[6] Univ Huelva, Dept Integrated Sci, E-21071 Huelva - Spain
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Physical Review D; v. 104, n. 5 SEP 24 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
We present a detailed study of the dynamics associated with the ghost sector of quenched QCD in the Landau gauge, where the relevant dynamical equations are supplemented with key inputs originating from large-volume lattice simulations. In particular, we solve the coupled system of Schwinger-Dyson equations that governs the evolution of the ghost dressing function and the ghost-gluon vertex, using as input for the gluon propagator lattice data that have been cured from volume and discretization artifacts. In addition, we explore the soft gluon limit of the same system, employing recent lattice data for the three-gluon vertex that enters in one of the diagrams defining the Schwinger-Dyson equation of the ghost-gluon vertex. The results obtained from the numerical treatment of these equations are in excellent agreement with lattice data for the ghost dressing function, once the latter have undergone the appropriate scale-setting and artifact elimination refinements. Moreover, the coincidence observed between the ghost-gluon vertex in general kinematics and in the soft gluon limit reveals an outstanding consistency of physical concepts and computational schemes. (AU) | |
| FAPESP's process: | 17/05685-2 - Hadronic physics in high energy nuclear collisions |
| Grantee: | Jun Takahashi |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 20/12795-1 - Evolution of the energy-momentum tensor during the pre-equilibrium phase of a heavy-ion collision |
| Grantee: | Antonio Maurício Soares Narciso Ferreira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 19/05656-8 - Gluon-ghost vertex and kernel in the Background Field Method |
| Grantee: | Cleiton de Oliveira Ambrósio |
| Support Opportunities: | Scholarships in Brazil - Master |