Elementary Particles (id: d8a9220e6)

本题目来源于试卷: Elementary Particles，类别为 IB物理学

[填空题]
The measured width o( )yd k6m)ch7 p*rnauqqx9 rg1femodl w66z3w2t+h wk.3 mv/ oj the $J/\psi$ (3685) meson is 277 keV. Estimate its lifetime. $\Delta E$ =    $ \times 10^{-21}\ \text{s}$

参考答案: 2.38±2%


本题详细解析:

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