Particle physics Flashcards
What is an antiparticle?
A particle of same mass, opposite charge, opposite lepton/baryon number
What is the anti particle of an electron? (e-)
Positron (e+)
What is different to charges inside the nucleus of atom to others in the real world?
Instead of repelling eachother they stay together
What is the strong nuclear force?
The force that keeps atoms together inside the nucleus of an atom but prevents them crushing eachother
What distance is the strong nuclear force repulsive?
0-0.5 fm (f=x10^15)
What distance is the strong nuclear force attractive?
0.5-3 fm (f=x10^15)
What types of particles experience the strong force?
Hadrons
What types of particles don’t experience the strong force?
Leptons
What are the hadrons and what is their composition?
Baryons: Baryon number of 1
Experience the strong force
3 Quarks
Protons and Neutrons
Mesons: Quark-antiquark pair
Pions and Kaons (2 quarks)
Kaons always have a strange particle
What particle always has a strange particle?
Kaons
How much bigger is a muon than an electron?
200 times
What is the quark composition of a proton?
UUD
What is the quark composition of a neutron?
UDD
Which of the baryons is the only stable one?
Proton
What is an isotope?
An atom with the same number of protons but different neutron number
If the radius of a nucleus is doubled then the number of nucleons increases by ?
8
What is the radius of a nucleus?
1x10e-15
What is the radius of an atom?
1x10e-10
