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Particles, Kaon decay

When asked to write an equation for K+ decay using only hadrons, I wrote K+ > π+ but the mark scheme had examples such as π+ + π0 or π+ + π+ + π0. Why do they have all of these extra pi particles, is my answer wrong?
Kaons usually decay into two or three pions, not just one.
Original post by Haneefa77
Kaons usually decay into two or three pions, not just one.

Got it, thank you!

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