Holographic glueball structure
| dc.creator | Forkel, Hilmar | |
| dc.date | 2007-11-07 | |
| dc.date | 2008-06-25 | |
| dc.date.accessioned | 2026-07-07T11:38:37Z | |
| dc.date.available | 2026-07-07T11:38:37Z | |
| dc.description | We derive and systematically analyze scalar glueball correlation functions in both the hard-wall and dilaton soft-wall approximations to holographic QCD. The dynamical content of the holographic correlators is uncovered by examining their spectral density and by relating them to the operator product expansion, a dilatational low-energy theorem and a recently suggested two-dimensional power correction associated with the short-distance behavior of the heavy-quark potential. This approach provides holographic estimates for the three lowest-dimensional gluon condensates or alternatively their Wilson coefficients, the two leading moments of the instanton size distribution in the QCD vacuum and an effective UV gluon mass. A remarkable complementarity between the nonperturbative physics of the hard- and soft-wall correlators emerges, and their ability to describe detailed QCD results can be assessed quantitatively. We further provide the first holographic estimates for the decay constants of the 0++ glueball and its excitations. The hard-wall background turns out to encode more of the relevant QCD physics, and its prediction f ~ 0.8-0.9 GeV for the phenomenologically important ground state decay constant agrees inside errors with recent QCD sum rule and lattice results. | |
| dc.description | 25 pages, discussion extended to match the published version (up to stylistic details), results and conclusions unchanged | |
| dc.identifier | https://arxiv.org/abs/0711.1179 | |
| dc.identifier | http://arxiv.org/abs/0711.1179 | |
| dc.identifier | Phys.Rev.D78:025001,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.025001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/199629 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Lattice | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Holographic glueball structure | |
| dc.type | text |