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作 者:CHENLing-Zhi PANGHou-Rong PINGJia-Lun WANGFan
机构地区:[1]DepartmentofPhysics,NanjingUniversity,Nanjing210093,China [2]DepartmentofPhysics,NanjingUniversity,Nanjing210093,China//InstituteofTheoreticalPhysics,theChineseAcademyofSciences,Beijing100080,China [3]DepartmentofPhysics,NanjingNormalUniversity,Nanjing210097,China//CenterforTheoreticalPhysics,NanjingUniversity,Nanjing210093,China [4]DepartmentofPhysics,NanjingUniversity,Nanjing210093,China//CenterforTheoreticalPhysics,NanjingUniversity,Nanjing210093,China
出 处:《Communications in Theoretical Physics》2005年第1期127-132,共6页理论物理通讯(英文版)
基 金:国家自然科学基金
摘 要:The gluon and Goldstone boson induced tensor interaction effect on thedibaryon mass and the D-wave decay width has been studied in the quark delocalization, colorscreening model. The effective S-D wave transition interactions induced by gluon and Goldstone bosonexchanges decrease quickly as the increasing of the channel strangeness. The K and η meson tensorcontribution is negligible in this model. No six-quark state in the light Savor world can become abound one by the help of these tensor interactions except the deuteron. The partial D-wave decaywidth of I J~p = (1/2) 2~+ NΩ state to spin 0, 1 ΛΞ final state is 20.7 keV and 63.1 keVrespectively. It is a very narrow dibaryon resonance and might be detected in the relativistic heavyion reaction by the existing RHIC detectors through the reconstruction of the ΛΞ vertex mass andthe future COMPAS detector at CERN and FAIR project in Germany.
关 键 词:DIBARYON tensor interaction extended quark delocalization color screeningmodel
分 类 号:O572.2[理学—粒子物理与原子核物理]
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