The BES f0(1810):: a new glueball candidate

被引:24
作者
Bicudo, P. [1 ]
Cotanch, S. R.
Llanes-Estrada, F. J.
Robertson, D. G.
机构
[1] Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal
[2] Inst Super Tecn, CFTP, P-1049001 Lisbon, Portugal
[3] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA
[4] Univ Complutense Madrid, Dept Fis Teor 1, E-28040 Madrid, Spain
[5] Otterbein Coll, Dept Phys & Astron, Westerville, OH 43081 USA
来源
EUROPEAN PHYSICAL JOURNAL C | 2007年 / 52卷 / 02期
关键词
D O I
10.1140/epjc/s10052-007-0377-5
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
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 K (K) over bar 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 decay width of a glueball with this mass to be roughly 100 M (K) over bar eV, 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 deserves further experimental investigation, especially in the K channel, and if shown to be different from the f(0)(1710), will become a solid glueball candidate. Finally we comment on other, but less likely, possible assignments for this state.
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收藏
页码:363 / 374
页数:12
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