2017/03/31 by Karunava Sil, Vikas Yadav, Aalok Misra · 3 citations
Physics and Astronomy · #hep-th #hep-lat #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-4921-7
v2:1+55 pages, LaTeX; references and clarifying remarks added, shortened by deleting old appendices, a sub-section and a table; to appear in Eur.Phys.J.C
arxiv created 2017/05/15 · arxiv updated 2017/06/28
The top-down type IIB holographic dual of large-N thermal QCD as constructed in arXiv:0902.1540 involving a fluxed resolved warped deformed conifold, its delocalized type IIA SYZ mirror as well as its M-theory uplift constructed in arXiv:1306.4339 - both in the finite gauge coupling (gs\stackrel<∼1)/`MQGP' limit of arXiv:1306.4339 - were shown explicitly to possess a local SU(3)/G2-structure in arXiv:1507.02692 Glueball spectroscopy at finite gauge coupling has thus far been missing in the literature. In this paper, we fill this gap by calculating the masses of the 0++, 0-+,0--, 1++, 2++ (`glueball') states (which correspond to fluctuations in the dilaton or complexified two-forms or appropriate metric components) in the aforementioned backgrounds of G-structure in the `MQGP' limit of arXiv:1306.4339, using WKB quantization conditions on one hand and imposing Neumann/Dirichlet boundary conditions at an IR cut-off/horizon radius rh on the solutions to the equations of motion on the other. We also discuss rh=0-limits of all calculations; in this context we also calculate the 0++, 0--,1++, 2++ glueball masses up to NLO in N and find a (gsM2)/(N)(gsNf)-suppression similar to and further validating a similar semi-universality of NLO corrections to transport coefficients, observed in arXiv:1606.04949.