## How does a pion decay into a muon?

Since the charged pions decay into two particles, a muon and a muon neutrino or antineutrino, then conservation of momentum and energy give the decay products definite energies. This contrasts with the three-particle decay of the neutral pion in which the emitted particles have a range of energies and momenta.

What pion means?

Definition of pion : a meson that is a combination of up and down quarks and antiquarks, that may be positive, negative, or neutral, and that has a mass about 270 times that of the electron.

Do kaons decay into muons?

In the following, two-body kaon decays to a muon and a SM neutrino are denoted K + → μ + ν μ , while those with a muon and a heavy neutrino are denoted K + → μ + ν h ; the notation K + → μ + N indicates either case.

### What are the properties of pions?

Pion

The quark structure of the positively charged pion.
Composition π + : u d π 0 : u u or d d π − : d u
Mean lifetime π ± : 2.6×10−8 s π 0 : 8.5×10−17 s
Electric charge π ± : ±1 e π 0 : 0 e
Charge radius π ± : ±0.659(4) fm

How long does it take a muon to decay?