- #1
malcomson
- 4
- 0
Doing some examples I came across the question:
Can the following processes occur and if not, why not? Draw Feynman diagrams for
the allowed processes.
one of which was
K(-) (u(bar) , s) + p → K(+) (u , s(bar)) + Σ(-) (d,d,s)
I thought that the strange quark could emit a W(-) and change to a up quark, that W boson could then change an up quark from the proton to a down quark.
At he same time the anti-up from the kaon could annihilate with the second up from the proton to create a gluon that then creates a strange anti-strange pair that go back into their respective particles.
The answers say
"not allowed, strong interation that violates strangeness conservation"
My question is - how can you tell it has to be via the strong interaction? Is there something I'm missing?
Can the following processes occur and if not, why not? Draw Feynman diagrams for
the allowed processes.
one of which was
K(-) (u(bar) , s) + p → K(+) (u , s(bar)) + Σ(-) (d,d,s)
I thought that the strange quark could emit a W(-) and change to a up quark, that W boson could then change an up quark from the proton to a down quark.
At he same time the anti-up from the kaon could annihilate with the second up from the proton to create a gluon that then creates a strange anti-strange pair that go back into their respective particles.
The answers say
"not allowed, strong interation that violates strangeness conservation"
My question is - how can you tell it has to be via the strong interaction? Is there something I'm missing?