1.5 Particles - Conservation and Strangeness Flashcards

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1
Q

Quantities which need to be conserved for particle reactions:

A

Charge
Baryon number
Lepton number
Strangeness

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2
Q

Quantities which need to be conserved in particle interactions:

A

Mass/energy
Momentum
Charge
Baryon number
Lepton number

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3
Q

Conservation of strangeness:

A

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

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4
Q

Weak interaction identification:

A

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

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5
Q

Strange particles:

A

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

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6
Q

Strangeness:

A

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

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