Decay of a Phi to charged kaons
Plot the mass distribution of neutral kaon Ks which decays to two charged kaons:
![\[\varphi \longrightarrow K^+ K^-\]](https://belle2.ijs.si/public/wp-content/ql-cache/quicklatex.com-d56ce54e5b93563727145e2ce8b7f97f_l3.png "Rendered by QuickLaTeX.com")
You will find a peak at 1.02 
, which is exactly the mass of the φ.
Plot the mass distribution of neutral kaon Ks which decays to two charged kaons:
You will find a peak at 1.02 , which is exactly the mass of the φ.