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Question: 

The measured width of the $\textrm{J}/\Psi$ meson is 88 keV. Estimate its mean life.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$7.5 \times 10^{-21} \textrm{ s}$

Giancoli 7th Edition, Chapter 32, Problem 29

(0:44)

Chapter 32, Problem 29 is solved.

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