1.5 Particles - Conservation and Strangeness

Question 1

Quantities which need to be conserved for particle reactions:

Answer 1

Charge
Baryon number
Lepton number
Strangeness

Question 2

Quantities which need to be conserved in particle interactions:

Answer 2

Mass/energy
Momentum
Charge
Baryon number
Lepton number

Question 3

Conservation of strangeness:

Answer 3

Strangeness is not conserved when a quark changes flavour (in weak interactions)
Strangeness must only be conserved in strong interactions

Question 4

Weak interaction identification:

Answer 4

If there is a change in strangeness in a particle interaction equation, that interaction is a weak interaction

Question 5

Strange particles:

Answer 5

Particles which are produced by the strong nuclear force but decay by the weak interaction

Question 6

Strangeness:

Answer 6

A property of particles, which shows that strange particles must be created in pairs, as strangeness has to be conserved in strong interactions
However, in weak interactions strangeness can change by +1, 0, -1