SciPost Submission Page
Centre Vortex Structure of QCD-Vacuum Fields and Confinement
by Derek Leinweber, James Biddle, Waseem Kamleh
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Derek Leinweber |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202201_00031v1 (pdf) |
| Date accepted: | 2022-04-06 |
| Date submitted: | 2022-01-24 06:46 |
| Submitted by: | Leinweber, Derek |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | XXXIII International Workshop on High Energy Physics (IWHEP2021) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
The non-trivial ground-state vacuum fields of QCD form the foundation of matter. Using modern visualisation techniques, this presentation examines the microscopic structure of these fields. Of particular interest are the centre vortices identified within the ground-state fields of lattice QCD. Our current focus is on understanding the manner in which dynamical fermions in the QCD vacuum alter the centre-vortex structure. The impact of dynamical fermions is significant and provides new insights into the role of centre vortices in underpinning both confinement and dynamical chiral symmetry breaking in QCD.
Published as SciPost Phys. Proc. 6, 004 (2022)
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-3-17 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202201_00031v1, delivered 2022-03-17, doi: 10.21468/SciPost.Report.4720
Strengths
Very nice and clear presentation of results
Very elaborated use of visualization
New results obtained for the center dominance phenomena
Weaknesses
Minor misprints
Report
The paper is devoted to the fundamental still unsolved problems of the non-perturbative QCD - the problem of confinement of quarks. There are various proposals for the confinement scenarios. The authors pursue the idea first formulated by t'Hooft that confinement is due to the center vortex configurations of the gauge field. Their subject is the impact of dynamical fermions on the properties of the center vortices.
In the Introduction the authors review the results of the numerous earlier studies of the center vortices properties and their role in the nonperturbative QCD. Section II is devoted to the definitions of the center gauge and center vortices. In section III the special features (lattice size, pion mass, lattice spacing, etc.) of the full QCD lattice configurations used in the work are explained. This section is devoted to a comparison of the center vortices in the full lattice QCD and in the lattice gluodynamics via visualization. It is observed that the dynamical fermions significantly increase the number of vortices. In section IV the static potential is discussed. The original static potential is compared with the static potential obtained from the center projected field and from the nonabelian field with removed vortices. The main observation is that the static potential obtained from the center projected field in full QCD has the same string tension as the original static potential. This is quite different from the quenched theory where the projected string tension is only 60% of the original one.
In my opinion, the paper presents new interesting results of the confinement problem studies. It definitely deserves to be published.
Requested changes
It is necessary to correct few misprints
1) a lattice spacing of a = 0.933 fm [26].
2) linking these these degrees of freedom