2015/01/31 by Frederic Brünner, Denis Parganlija, Anton Rebhan · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Glueball #Gluon #Gravitation #Graviton #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scalar (mathematics) #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.1103/physrevd.91.106002
published as Phys. Rev. D 91, 106002 (2015) · 38 pages, 5 figures, 9 tables; v2: minor corrections (numerical data in tables 3, 5, and 7 on excited scalar glueballs), 2 footnotes and 2 references added; v3: corrections in table 9 (extrapolations of tensor glueball decay to masses above 2 GeV)
openalex publication_date 2015/05/14 · arxiv created 2016/04/22 · arxiv updated 2016/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We revisit and extend previous calculations of glueball decay rates in the Sakai-Sugimoto model, a holographic top-down approach for QCD with chiral quarks based on D8\text\ensuremath-D8 probe branes in Witten's holographic model of nonsupersymmetric Yang-Mills theory. The rates for decays into two pions, two vector mesons, four pions, and the strongly suppressed decay into four \ensuremathπ0 are worked out quantitatively, using a range of the 't Hooft coupling which closely reproduces the decay rate of \ensuremathρ and \ensuremathω mesons and also leads to a gluon condensate consistent with QCD sum rule calculations. The lowest holographic glueball, which arises from a rather exotic polarization of gravitons in the supergravity background, turns out to have a significantly lower mass and larger width than the two widely discussed glueball candidates f0(1500) and f0(1710). The lowest nonexotic and predominantly dilatonic scalar mode, which has a mass of 1487 MeV in the Witten-Sakai-Sugimoto model, instead provides a narrow glueball state, and we conjecture that only this nonexotic mode should be identified with a scalar glueball component of f0(1500) or f0(1710). Moreover the decay pattern of the tensor glueball is determined, which is found to have a comparatively broad total width when its mass is adjusted to around or above 2 GeV.