- KNOW YOUR FORMULA SHEET
- Hadrons feel the strong nuclear force and are made of quarks
- Baryons are made of three quarks, mesons are made of two quarks (a quark and antiquark)
- Protons are uud, neutrons are udd
- Baryons eventually decay into protons (protons are the only stable baryon)
- Neutrons decay into a proton, an electron and an antineutrino (beta minus decay)
- Protons decay into a neutron, a positron and an neutrino (beta plus decay)
- Hadron – heavy and strong Lepton – light and weak
- Leptons have a lepton number of 1 (or minus 1 for antiparticles) and lepton number is conserved
- Leptons can change into other leptons during decay via the weak interaction
- Strangeness is conserved in a strong interaction
- K mesons are strange particles (containing a strange or antistrange quark) formed through the strong interaction and decay through the weak interaction into π mesons, muons and antineutrinos
- π mesons Charged π mesons decay into muons and antineutrinos (or antimuons and neutrinos), π zero pions decay into photons
- Muons decay into electrons and antineutrinos (or antiparticles)
Thursday, 8 November 2012
Particle physics tips
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