Instanton dynamics in finite temperature QCD via holography
Volume
899
Pagination
631 - 650
Publisher
DOI
10.1016/j.nuclphysb.2015.08.018
Journal
Nuclear Physics B
ISSN
0550-3213
Metadata
Show full item recordAbstract
We investigate instantons in finite temperature QCD via Witten's holographic QCD. To study the deconfinement phase, we use the setup proposed in [1]. We find that the sizes of the instantons are stabilized at certain values both in the confinement and deconfinement phases. This agrees with the numerical result in the lattice gauge theory. Besides we find that the gravity duals of the large and small instantons in the deconfinement phase have different topologies. We also argue that the fluctuation of the topological charges is large in confinement phase while it is exponentially suppressed in deconfinement phase, and a continuous transition occurs at the Gross–Witten–Wadia (GWW) point. It would be difficult to observe the counterpart of this transition in lattice QCD, since the GWW point in QCD may stay at an unstable branch.
Authors
Hanada, M; Matsuo, Y; Morita, TCollections
- Mathematics [1686]