Analyse with respecto to quark content

[rayman123]

Homework Statement

I have a reaction
$$\Omega^{-}(sss)\rightarrow\Lambda^{0}(uds)+K^{-}(\bar{u}s)$$ I am supposed to analyse the reaction according to the quark content
and I have connected u with $$\bar{u}$$, s with s, another s with s and I am left with s and d...how can I solve this?
there can not be transistion between s into d...

Homework Equations

The Attempt at a Solution

 

[vela]

there can not be transistion between s into d.

Why not?

 

[rayman123]

in my book there are only following transitions showed (I thought they were the only possible ones)
$$u\rightarrow d+W^{+}$$
$$\bar{u}\rightarrow\bar{d}+W^{-}$$
$$s\rightarrow\bar{u}+W^{-}$$
$$\bar{s}\rightarrow\bar{u}+W^{+}$$

I have never seen transformation such as
$$s\righarrow d+?$$ where I can find full list of available transformations? or is there a system which governs these transformations?

 

[vela]

The weak force is mediated by two bosons, the W and the Z. Were you given any transitions involving the Z?

 

[rayman123]

nope, we only talked about the boson W.