  We announce new results on glueball decay rates in the Sakai-Sugimoto model,
a realization of holographic QCD from first principles that has only one
coupling constant and an overall mass scale as free parameters. We extend a
previous investigation by Hashimoto, Tan, and Terashima who have considered the
lowest scalar glueball which arises from a somewhat exotic polarization of
supergravity modes and whose mass is uncomfortably small in comparison with
lattice results. On the other hand, the scalar glueball dual to the dilaton
turns out to have a mass of about twice the mass of the rho meson (1487 MeV),
very close to the scalar meson $f_0(1500)$ that is frequently interpreted as
predominantly glue. Calculating the decay rate into two pions we find a
surprisingly good agreement with experimental data for the $f_0(1500)$. We have
also obtained decay widths for tensor and excited scalar glueballs, indicating
universal narrowness.
