Flashcards in Leptons Deck (16):
What are leptons?
• Fundamental Particles and antiparticles that do not interact through strong interaction ( they do not feel strong nuclear force ).
How do leptons interact?
• Weak interaction
• Gravitational Interaction
• Electromagnetic Interaction, if they are charged.
How do leptons interact with other particles?
Via weak interaction
What are the different leptons?
What do Muons decay into?
What are the two types of neutrino for leptons?
What are neutrinos?
Particles with zero or almost zero mass, and zero electric charge.
How do leptons become other leptons?
Through weak interaction.
How are leptons produced/annihilated?
What is the lepton number?
• Number of leptons, each lepton has a number of +1.
• There are two types of lepton numbers, electron and muon.
• These different lepton numbers must be counted separately.
What happens in an interaction between a lepton and a Hadron?
• A neutrino or anti-neutrino can change into or from a corresponding charged lepton.
• An electron neutrino can therefore interact with a neutron to produce a proton and an electron.
• An electron neutrino and a neutron can not change into an anti-proton and a positron.
Why can an electron neutrino and a neutron not change into an anti-proton and a positron?
The lepton number is not conserved:
Ve + n > (anti)P + e+
Lepton number of +1 in the left, Lepton number of -1 on the right, no conservation.
What is a rule for all lepton interactions?
Both types of lepton number must be conserved in any change.
What is the lepton number for anti-leptons?
What is the lepton number for leptons?