Fundamental particles. Interact through weak interaction. Interact through electromagnetic if charged. Lepton number must be conserved. 3 types of Lepton as well as 3 neutrino types and anti-particle of all 6.
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Lepton (Electron)
Most stable lepton, all other decay into electrons. Charge = -1. Lepton(e) = 1. Lepton(t+m)=0
Antiparticle of Leptons have opposite charge(+1). Also have negative Lepton number(-1 instead of 1)
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Lepton (Neutrino)
Neutrino is always associated with its lepton. Charge = 0. Same Lepton numbers as its Lepton e.g. electron neutrino is: L(e)=1.L(m/t)=0
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Lepton(Anti-particle Neutrino)
Neutrino is always associated with its lepton. Charge = 0. Same Lepton numbers as its Lepton e.g. positron neutrino is: L(e)=-1.L(m/t)=0
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Quarks General
Fundamental particles. Can't exist in isolation Quarks make matter and anti-quarks anti-matter. 3 types: Up(u), Down(d), Strange(s)
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Quarks (Up)
Symbol = u. Charge = +2/3. Strangeness = 0
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Quark (Down)
Symbol = d. Charge = -1/3. Strangeness = 0
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Quark (Strange)
Symbol = s. Charge = -1/3. Strangeness = -1. Strange particles produced through strong interaction, decay through weak. Strangeness must be conserved in strong intera. not in weak
Not fundamental particles. Made up of quarks. 2 Groups: Baryons(3 Quarks),Mesons(Quark-Antiquark pair). Interact through Strong nuclear force, electromagnetic if charged. Decay through weak
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Baryons General
Are Hadrons. Made of 3 quarks. Not leptons so Lepton number is 0. Baryon Number is conserved
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Baryon (Proton)
The only stable baryon.Other baryons decay into protons.Symbol = P. Charge = +1. Baryon Number = 1. Quark Structure = uud. Quark Charge = (+2/3)+(+2/3)+(-1/3) = 1
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Baryon (Neutron)
Symbol = N. Charge = 0. Baryon Number = 1. Quark Structure = udd. Quark Charge = (+2/3)+(-1/3)+(-1/3) = 0
Hadrons. Quark-Antiquark pair. Need to know about π and Κ mesons. Formed by high energy cosmic rays hitting the atmosphere. Discovered using cloud chambers. All mesons are unstable. Last around 10^(-8) seconds. See diagram for structure etc.
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Kaon
Decays into pions
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Pion
Exchange particles for strong nuclear force
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Decay of a Neutron
N -> P + e(-) + anti-electron neutrino
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Other cards in this set
Card 2
Front
Most stable lepton, all other decay into electrons. Charge = -1. Lepton(e) = 1. Lepton(t+m)=0
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