Mesons介子
Mesons are intermediate mass particles which are made up of a quark-antiquark pair. Three quark combinations are called baryons. Mesons are bosons, while the baryons are fermions. 1* The neutral Kaons K0s and K0L represent symmetric and antisymmetric mixtures of the quark combinations down-antistrange and antidown-strange. 中性K介子K⁰ₛ和K⁰ᴸ是下夸克与反strange夸克组合的对称混合和反对称混合。
2* The neutral eta meson is considered to be a quark combination ![]() 中性eta介子被认为是由夸克组成的。
Note: In the table, antiquarks are indicated by an underline, e.g., ud means a combination of an up and an antidown quark. 注意:在表中,反夸克用下划线表示,例如u d表示一个上夸克和一个反下夸克的组合。
Most of the listed decay times are in the range 10-13 to 10-8 s which indicates decay by the weak interaction. These decays involve quark transformations which can be represented by Feynman diagrams. 大多数列出的衰变时间在10⁻¹³到10⁻⁸秒的范围内,这表明是通过弱相互作用衰变。这些衰变涉及夸克转变,可以用费曼图来表示。
介子是介于质子和中子之间的粒子,由一个夸克和一个反夸克组成。三种夸克组合称为重子。介子是玻色子,而重子是费米子。
注意,下划线表示反粒子。 |
Index Particle concepts References Serway Ch. 47 Giancoli Ch. 32 Griffiths ![]() Particle Data Group 索引 粒子概念 参考文献 Serway 第47章 Giancoli 第32章 Griffiths 质子数据组 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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