The soft-gluon limit and the infrared enhancement of the quark-gluon vertex
Abstract The Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement o...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-8037-0 |
| _version_ | 1819106705022124032 |
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| author | Orlando Oliveira Tobias Frederico Wayne de Paula |
| author_facet | Orlando Oliveira Tobias Frederico Wayne de Paula |
| author_sort | Orlando Oliveira |
| collection | DOAJ |
| description | Abstract The Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement of the infrared quark-gluon vertex. We also find that the relative contribution of the quark-ghost kernel to the quark-gluon vertex in the infrared region does not follow the rules from the perturbative analysis of the ultraviolet region. This shows that for QCD the intuition based on perturbation theory does not apply to the full momentum range. The framework developed in the current work provides analytical expressions for all the longitudinal components of vertex taken into account. |
| first_indexed | 2024-12-22T02:42:23Z |
| format | Article |
| id | doaj.art-6f3b59d7a2b0428cb0e7b39bc366e8a2 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-22T02:42:23Z |
| publishDate | 2020-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-6f3b59d7a2b0428cb0e7b39bc366e8a22022-12-21T18:41:37ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-05-0180511310.1140/epjc/s10052-020-8037-0The soft-gluon limit and the infrared enhancement of the quark-gluon vertexOrlando Oliveira0Tobias Frederico1Wayne de Paula2CFisUC, Departamento de Física, Universidade de CoimbraInstituto Tecnológico da AeronáuticaInstituto Tecnológico da AeronáuticaAbstract The Schwinger–Dyson quark equation (SDE) combined with results from lattice simulation for the propagators are used to obtain information on the quark-gluon vertex, taking into account the recent full QCD lattice results for the soft-gluon limit. Its inclusion leads to a clear enhancement of the infrared quark-gluon vertex. We also find that the relative contribution of the quark-ghost kernel to the quark-gluon vertex in the infrared region does not follow the rules from the perturbative analysis of the ultraviolet region. This shows that for QCD the intuition based on perturbation theory does not apply to the full momentum range. The framework developed in the current work provides analytical expressions for all the longitudinal components of vertex taken into account.http://link.springer.com/article/10.1140/epjc/s10052-020-8037-0 |
| spellingShingle | Orlando Oliveira Tobias Frederico Wayne de Paula The soft-gluon limit and the infrared enhancement of the quark-gluon vertex European Physical Journal C: Particles and Fields |
| title | The soft-gluon limit and the infrared enhancement of the quark-gluon vertex |
| title_full | The soft-gluon limit and the infrared enhancement of the quark-gluon vertex |
| title_fullStr | The soft-gluon limit and the infrared enhancement of the quark-gluon vertex |
| title_full_unstemmed | The soft-gluon limit and the infrared enhancement of the quark-gluon vertex |
| title_short | The soft-gluon limit and the infrared enhancement of the quark-gluon vertex |
| title_sort | soft gluon limit and the infrared enhancement of the quark gluon vertex |
| url | http://link.springer.com/article/10.1140/epjc/s10052-020-8037-0 |
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