Particles Flashcards
What is an isotope?
Atoms with the same number of protons, but a different number of neutrons
At what range does the SNF have no effect?
> 3fm
At what range does the SNF change from being attractive to repulsive?
0.5fm
What happens in pair production?
A photon with enough energy converts its energy into a particle and its corresponding anti-particle
What happens in annihilation?
A particle and corresponding anti-particle meet and their mass is converted into 2 photons traveling in opposite directions to conserve momentum
What is anti-matter?
Particles that have the same mas as their corresponding matter particle but all other properties are the opposite
What is a lepton?
A type of particle that does not experience the SNF and is fundamental
What is a hadron?
A particle that does experience the SNF and is made up of smaller particles
What is the difference between a baryon and a meson?
A baryon is made of 3 quarks, and a meson is made of a quark and an anti-quark
What are the 6 mesons
Pion+, pion0, pion-, kaon+, kaon0, kaon-
What’s the strangeness of each of the kaons?
K+= +1
K0= +1
K-= -1
What is the quark structure of a proton?
Up, up, down
What’s the quark structure of a neutron?
Up, down, down
What is the only stable baryon?
Proton, and all other baryons decay into it
What do kaons decay into?
Pions
What do muons decay into?
Electrons
How are strange particles produced?
Through the strange interaction
Through which interaction do strange particales decay?
Weak
Why are strange particles produced in pairs?
To conserve the strong interaction
What does a neutron decay into?
A proton, electron, and an anti-elecrton neutrino
