Chiral Suppression and SU（3） Symmetry in Scalar Glueball Decays  

作　　者：金洪英 刘少敏 张珠峰 李学潜 

机构地区：[1]Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027 [2]Department of Physics, Nankai University, Tianjin 300071

出　　处：《Chinese Physics Letters》2008年第5期1609-1612,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10775117.

摘　　要：We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.

关 键 词：WAVE-FUNCTION QCD 

分 类 号：O4[理学—物理]