Glueball decay rates in the Witten-Sakai-Sugimoto model

Frederic Brünner, Denis Parganlija, and Anton Rebhan
Phys. Rev. D 91, 106002 – Published 14 May 2015; Erratum Phys. Rev. D 93, 109903 (2016)

Abstract

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 D8D8¯ 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 π0 are worked out quantitatively, using a range of the ’t Hooft coupling which closely reproduces the decay rate of ρ and ω 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 13 March 2015

DOI:https://doi.org/10.1103/PhysRevD.91.106002

© 2015 American Physical Society

Erratum

Erratum: Glueball decay rates in the Witten-Sakai-Sugimoto model [Phys. Rev. D 91, 106002 (2015)]

Frederic Brünner, Denis Parganlija, and Anton Rebhan
Phys. Rev. D 93, 109903 (2016)

Authors & Affiliations

Frederic Brünner, Denis Parganlija, and Anton Rebhan

  • Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 91, Iss. 10 — 15 May 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×