| 释义 |
xi baryonn.（名词）- Either of two subatomic particles in the baryon family, one neutral and one negatively charged, with masses of 2,630 and 2,643 times that of the electron and average lifetimes of 2.9 × 10-10 and 1.6 × 10 -10 seconds. Also called xi Ξ重子：重子类两种次原子粒中任一种，其一为中性，另一为带负电，质量为电子的2,630和2,643倍，平均寿命为2.9×10-10和1.6×10 -10秒 也作 xi
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