摘要
利用包含η,η'的一些辐射跃迁和它们的双光子衰变过程和某些J/ψ→P +V(赝标介子和矢量介子)电磁过程的最新实验数据,对赝标介子η,η’和非 (q,)同位旋标量味单态(如 ι/η(1440)的混合问题进行了研究.用最小二乘法 拟合两种方案的混合参数,发现若仅考虑η和η'的混合,则拟合结果不够好. 若考虑η,η’和此非(q)介子(以后用ι表示)的混合,则拟合结果比较好.其结 果表明η'必混有少量非(q)成份,而。中也混有一定的(q)成份.
The data of radiative decays involving η, η' and their two-photon decay process and some electromagnetic processes of the J/ψ-P + V (Pseudoscalar and Vector mesons) have been used to study the admixture of pseudoscalar mesons η,η' and non-q isoscalar flavor singlet (such as ι/η (1440) ). The 'mixing parameters of two schemes are fitted by using the method of least Squares. If we only consider the mixing of η and η' the fitting result is not good. If the admixture of η, η' and the non-qq mesons (represented by ι later on) has been considered the result is better. The conclusion is that the η' may contain a few non-qq component and ι has some qq component.
出处
《高能物理与核物理》
CSCD
北大核心
2000年第3期190-195,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
中国科学院基金
关键词
胶球
混合
最小二乘法
赝标介子
glueball, admixture, method of least squares