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Exploring the quark-gluon vertex with Slavnov–Taylor identities and lattice simulations

Oliveira, Orlando ; Frederico, T. ; de Paula, W. ; de Melo, J. P. B. C.

The European physical journal. C, Particles and fields, 2018-07, Vol.78 (7), p.1-7, Article 553 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Exploring the quark-gluon vertex with Slavnov–Taylor identities and lattice simulations
Autor: Oliveira, Orlando ; Frederico, T. ; de Paula, W. ; de Melo, J. P. B. C.
Assuntos: Astronomy ; Astrophysics and Cosmology ; Bethe-Salpeter equation ; Dependence ; Elementary Particles ; Form factors ; Hadrons ; Heavy Ions ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Physics ; Physics and Astronomy ; Quantum chromodynamics ; Quantum Field Theories ; Quantum Field Theory ; Quarks ; Regular Article - Theoretical Physics ; Simulation ; String Theory
É parte de: The European physical journal. C, Particles and fields, 2018-07, Vol.78 (7), p.1-7, Article 553
Descrição: The soft gluon limit of the longitudinal part of the quark-gluon vertex is studied by resorting to non-perturbative approaches to quantum chromodynamics (QCD). Based on a Slavnov–Taylor identity (STI), the longitudinal form factors is expressed in terms of the quark-ghost kernel, the quark self energy and the quark wave function. An exact relation between the non-vanishing longitudinal form factors is derived for the soft gluon limit and explored to understand the behaviour of the vertex. Within a Ball–Chiu vertex, the form factor λ 1 was analysed using recent lattice simulations for full QCD for the soft gluon limit. The lattice data shows that the gluon propagator resumes the momentum dependence of such component of the vertex. This connection is understood via a fully dressed one-loop Bethe–Salpeter equation. The behaviour of the remaining longitudinal form factors λ 2 ( p 2 ) and λ 3 ( p 2 ) is investigated combining both the information of lattice simulations and the derived relations based on the STI.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Exploring the quark-gluon vertex with Slavnov–Taylor identities and lattice simulations

Oliveira, Orlando ; Frederico, T. ; de Paula, W. ; de Melo, J. P. B. C.

Berlin/Heidelberg: Springer Berlin Heidelberg

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