Quarks 64-65 Flashcards
Draw the table with the following columns: name, symbol, charge, baryon number and strangeness. Then fill out the table for the following quarks: up, down and strange.
The table can be found on page 64 of the text book.
Draw the table with the following columns: name, symbol, charge, baryon number and strangeness. Then fill out the table for the following antiquarks: anti-up, anti-down and anti-strange.
The table can be found on page 64 of the text book.
Evidence of quarks came from what?
Evidence for quarks came from hitting protons with high-energy electrons. The way the electrons scattered showed that there were three concentrations of charge(quarks) inside the proton.
Draw the quark model of a proton.
Calculate the protons total charge.
2/3 + 2/3 - 1/3 = 1
Calculate the baryon number of a proton and a neutron.
proton: 1/3 + 1/3 + 1/3 = 1
neutron: 1/3 + 1/3 + 1/3 = 1
Draw the quark models of a proton, neutron, anti-proton and anti-neutron.
What happens if you blasted with enough energy ( flew an electron into it) - what would happen?
The energy just gets changed into more quarks and antiquarks - it’s pair production again and you just make quark-antiquark pairs.
Explain are the types of gauge bosons that cause the strong interaction and what types of particles are affected by the strong interaction?
The type of gauge boson is a gluon.
The particles affected are hadrons only.
What is the gauge boson that creates the electromagnetic interaction and what particles does it affect?
It affects the proton.
The gauge boson that creates electromagnetic interaction is the photon.
What gauge boson creates the weak interaction and what types of particles are affected by this interaction?
The gauge bosons that create this interaction are:
W+, W- and Z0.
All particles are affected by this interaction.
Why have physists never bothered about coming up with the type of gauge boson that creates gravity?
Because gravity is so incredibly feeble compared with other types of interaction. Gravity only reall matters when you’ve got big masses like stars and planets. The graviton may exist but there’s no evidence.
What is the gauge boson that holds protons and neutrons together in an atom?
The gluon.
What happens to the gluon field when you attempt to seperate quarks?
As you try to seperate quarks, you actually increase the energy of the gluon field, increasing the attraction between them.
If you keep pulling, eventually the energy in the gluon field will be enough that it produces a quark-antiquark pair. This is why you can never detect a quark on its own.
