- Muon= Heavy electron(same charge but x200 mass)
- Pion=positive or neutral larger rest mas than a muon but less than a proton
- Kaon= positive negative or neutral greater mass than a pion but less than a pion
These are divided into two groups Hadrons(Protons,neutrons, pie mesons & k mesoms) & Leptons(electrons,muons & nutrinos) according to weather or not they act throught strong interaction
- Leptons interact throught thr weack and electro magnetic interaction if charges
- Hadrons interact throught stong and electromagnetic if charged hadrons decay throught weack interaction
Hadrons can also be split into two groups
- Baryons-Protons and things that decay in to proton (3 quarks)
- Mesoms-hadrons that dopnot include a proton in there decay (2 quarks)
in an interaction between a hadron & lepton a nutrino or antinutrino can change into or friom a corrisponding charged lepton. in muon decay the muon changes into a muon nutrino in addition an electron antinutrino are created to conserve charge
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