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Kızılersü, Ayşe, Oliveira, Orlando, Silva, Paulo J., Skullerud, Jon-Ivar and Sternbeck, André (2021) Quark-gluon vertex from Nf=2 lattice QCD. Physical Review D, 103 (11). 114515-11-114515-21. ISSN 2470-0010
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Abstract
We study the quark-gluon vertex in the limit of vanishing gluon momentum using lattice QCD with two
flavors of O(a) improved Wilson fermions, for several lattice spacings and quark masses. We find that all
three form factors in this kinematics have a significant infrared strength and that both the leading form
factor λ1, multiplying the tree-level vertex structure, and the scalar, chiral symmetry breaking form factor λ3
are significantly enhanced in the infrared compared to the quenched (Nf=0) case. These enhancements
are orders of magnitude larger than predicted by one-loop perturbation theory. We find only a weak
dependence on the lattice spacing and quark mass.
| Item Type: | Article |
|---|---|
| Keywords: | Quark-gluon; vertex; Nf = 2; lattice; QCD; |
| Academic Unit: | Faculty of Science and Engineering > Research Institutes > Hamilton Institute Faculty of Science and Engineering > Theoretical Physics |
| Item ID: | 15665 |
| Identification Number: | 10.1103/PhysRevD.103.114515 |
| Depositing User: | Dr. Jonivar Skullerud |
| Date Deposited: | 14 Mar 2022 12:55 |
| Journal or Publication Title: | Physical Review D |
| Publisher: | American Physical Society |
| Refereed: | Yes |
| Related URLs: | |
| URI: | https://mural.maynoothuniversity.ie/id/eprint/15665 |
| Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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