Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-02-19
Eur.Phys.J.C52:363-374,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 4 figures. Major substantive additions, including an ab-initio, QCD-based computation of the glueball inclusive deca
Scientific paper
10.1140/epjc/s10052-007-0377-5
We analyze the f_0(1810) state recently observed by the BES collaboration via radiative J/\psi decay to a resonant \phi\omega spectrum and confront it with DM2 data and glueball theory. The DM2 group only measured \omega\omega decays and reported a pseudoscalar but no scalar resonance in this mass region. A rescattering mechanism from the open flavored KKbar decay channel is considered to explain why the resonance is only seen in the flavor asymmetric \omega\phi branch along with a discussion of positive C parity charmonia decays to strengthen the case for preferred open flavor glueball decays. We also calculate the total glueball decay width to be roughly 100 MeV, in agreement with the narrow, newly found f_0, and smaller than the expected estimate of 200-400 MeV. We conclude that this discovered scalar hadron is a solid glueball candidate and deserves further experimental investigation, especially in the K-Kbar channel. Finally we comment on other, but less likely, possible assignments for this state.
Bicudo Pedro
Cotanch Stephen R.
Llanes-Estrada Felipe J.
Robertson David G.
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