Question

The table below shows events that can be observed in particle colliders or nature, and events...

The table below shows events that can be observed in particle colliders or nature, and events that can never be observed. For each, characterize the event as a decay or a collision. For the observed decays, explain which force is mainly responsible for the interaction; for those that are not observed, indicate which quantity or quantities are not conserved.

Observed Events Unobserved Events
?→?+?−+? ?+?→?+?
?++?→?+?0 ?→?++?0

?−+?→?+?−+?+
?→?++?−
?−+?→?+?0+?− ?++?→?++?0
Δ0→?+?− Δ0→?++?−+?0
Δ0→?+?0 Δ0→?++?−
?+?→?+?+?− ?0+?→?++?−
?+?→?+?+?+ ?0+?→?+?
?++?−→?+? Δ0→?+?0+??
?++?−→?+? ?−→?−+?

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