| 释义 |
J particle J particle n.(名词)A neutral meson having an unusually large mass (about 6,060 times the mass of an electron) and a long lifetime (about 10&9{-20} second). Also called psi particle See table at subatomic particle J粒子:一种中性介子,质量异常大(约为电子质量的6,060倍),寿命长(约为10&9{-20}秒) 也作 psi particle参见 subatomic particle |