分类: 物理学 >> 基本粒子与场物理学 提交时间: 2017-09-17
摘要: From the large-Nc QCD point of view, baryonia, tetra-quark states, hybrids, and glueballs arestudied. The existence of these states is argued for. They are constructed from baryons. In Nf = 1,large Nc QCD, a baryonium is always identical to a glueball with Nc valence gluons. The groundstate 0−+ glueball has a mass about 2450 MeV. f0(1710) is identified as the lowest 0++ glueball.The lowest four-quark nonet should be f0(1370), a0(1450), K∗0 (1430) and f0(1500). Combiningwith the heavy quark effective theory, spectra of heavy baryonia and heavy tetra-quark states arepredicted. 1/Nc corrections are discussed.