2) Particles, Antiparticles and Photons Flashcards
State the quark composition of a meson.
-Quark-antiquark pair.
What is the exchange particle for the weak interaction?
W+.
What is the exchange particle for electromagnetic interaction?
-Photon/γ.
State the quark composition of a proton.
-uud.
Name the exchange particle for gravity.
Gravitons.
Name the exchange particle for electromagnetic interactions.
γ photons.
Name the exchange particle for the strong nuclear force.
Pions.
State what roles exchange particles can play in an interaction.
- Transfers energy.
- Transfers momentum.
- Transfers force.
State the quark structure of an antibaryon.
-Consists of 3 antiquarks.
Name two baryons.
-Proton and neutron.
Give three characteristics of a strange particle that makes it different from a particle that is not strange.
- Contains a strange quark.
- Longer half life than expected.
- Decays by weak interaction.
Give one difference and one similarity between a negative muon and an electron.
- Difference: Mass or half-life.
- Similarity: Both are negatively charged.
State two differences between hadrons and leptons.
-Leptons do not experience the strong interaction but
hadrons do.
-Hadrons are made up of quarks whereas leptons are not.
Hadrons can be further divided into two groups. Name these two groups and state a difference between them.
- Baryons and mesons.
- Baryons are made from three quarks
- Mesons are made from a quark, antiquark pair.
What property defines a hadron?
-Particles that experience the strong nuclear force/interaction.
