形成η介子核束缚态的可能性  

POSSIBILITY ON FORMATION OF η-MESON NUCLEUS BOUND STATES

作　　者：柳继锋[1] 沈建平[2] 厉光烈[2] 

机构地区：[1]广西师范大学物理系 [2]中国科学院高能物理研究所

出　　处：《高能物理与核物理》1990年第12期1096-1102,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金

摘　　要：本文使用多体问题的标准格林函数方法研究η介子核束缚态的形成.我们的计算结果表明,耦合常数及谐振子势在物理合理的范围内,确实有可能形成η介子核^(1(?))O_η的束缚态,这主要是由于_ηNN(1/2,(1/2)^-)相互作用是吸引的.但是,束缚态宽度Γ比结合能B_E大,这将给观测束缚态带来困难.The formation of η-meson-nucleus bound states is investigated, using a standard Green's function of many-body problems. Within physically reasonable range of the parameters (coupling constants and harmonic oscillator potentials), we find that the η-^(l6)O bound state is indeed possible and depends crucially on the ηNN(1/2,(1/2)^-) interaction being attractive. Our results indicate that the widths Γ are larger than the η binding energy in ^(16)O_η, which would make the observation of such states difficult.

关 键 词：Η介子 核物质 束缚态 

分 类 号：O572.339[理学—粒子物理与原子核物理]