What conservation laws must be obeyed in all interactions?
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What is the decay equation for beta minus decay at the quark level?
When the neutron decays into a proton, a down quark decays into a up quark.
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Is strangeness is always conserved in a weak interaction?
No
Strangeness is only conserved in the strong interaction.
In a weak interaction the strangeness can change by 0, -1, or +1.
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What is the decay equation for beta plus decay at the quark level?
When the proton decays into a neutron, a up quark decays into a down quark.
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In what type of interaction is strangeness not conserved?
Strangeness does not have to be conserved in weak interactions.
Strangeness can change by +1, 0 or -1 in weak interactions.
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In what type of interaction is strangeness always conserved?
Strangeness is always conserved in strong interactions.
Strange particles are created by the strong interaction.
When a strange quark is created it must also be with an anti-strange quark to conserve strangeness.
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