Glueball Decay in the Witten-Sakai-Sugimoto Model and Finite Quark Masses

Oct 25, 2015
8 pages
Published in:
  • PoS CD15 (2015) 124
Contribution to:
  • Published: Oct 25, 2015 by SISSA
e-Print:

Citations per year

20142015201602
Abstract: (arXiv)
We discuss recent results on the calculation of glueball decay rates in the Witten-Sakai-Sugimoto model, which favor the f0(1710)f_0(1710) meson as a glueball candidate. The flavor asymmetric decay of f0(1710)f_0(1710) is frequently attributed to a putative chiral suppression in glueball decays, which is however questionable in view of the large constituent quark masses induced by chiral symmetry breaking. We find that this can be explained by what we call nonchiral enhancement when finite quark masses are included in the holographic model, with good quantitative agreement with experimental data for f0(1710)f_0(1710). Assuming the latter to indeed be a nearly pure glueball, the model makes essentially parameter-free and thus falsifiable predictions for its decay rates involving vector mesons and an upper limit on the ηη\eta\eta' decay rate.
Note:
  • 8 pages, 1 figure. To appear in the proceedings of the 8th International Workshop on Chiral Dynamics, CD2015, Pisa,Italy
  • quark: mass
  • glueball: decay rate
  • symmetry breaking: chiral
  • flavor: asymmetry
  • enhancement
  • holography
  • Sakai-Sugimoto model
  • f0(1710): decay