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非奇异夸克偶数能谱的耦合道效应

发表时间:2014-02-15  浏览量:1511  下载量:401
全部作者: 邹静,平加伦
作者单位: 南京师范大学物理科学与技术学院
摘 要: 介子不仅含有夸克-反夸克成分,还存在多夸克和胶子成分。在手征组分夸克模型的基础上,首先利用多高斯展开方法计算作为两夸克体系的介子能谱,利用所得到的能量和波函数,借助于3P0模型,计算了四夸克成分对非奇异介子谱的影响,发现由于四夸克成分的耦合道效应,非奇异介子的质量有很大移动。通过模型参数的调整,虽然此效应大部分可以被参数吸收,但其对能谱的影响较大。因此,高Fock态的贡献不能忽略,需要进一步研究。
关 键 词: 高能物理学;组分夸克模型;多高斯展开;3P0模型;质量平移
Title: Channel-coupling effects of nonstrange quarkonia
Author: ZOU Jing, PING Jialun
Organization: School of Physical Science and Technology, Nanjing Normal University
Abstract: Meson not only includes the component of quark-antiquark, but multi-quarkand gluon components as well. Based on the framework of chiral quark model, the quark-antiquark meson pectrum is calculated by Gaussian expansion method. Then the masses and wave functions of uark-antiquark clusters are employed to calculate the mass shifts of the quark-antiquark lusters due to the coupling with the four-quark components according to 3P0 model. The results show that the mass shifts are rather large for nonstrange mesons. The effect of the contribution for high Fock cannot be ignored, although the most of the effects can be absorbed by re-adjusting the model parameters. Further study of ulti-quark components are needed.
Key words: high energy physics; constituent quark model; Gaussian expansion method; 3P0 model; mass shift
发表期数: 2014年2月第3期
引用格式: 邹静,平加伦. 非奇异夸克偶数能谱的耦合道效应[J]. 中国科技论文在线精品论文,2014,7(3):254-261.
 
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