What kind of force mediates the reaction:
K- + alpha(ppnn) -> pi- + "hypernucleus"(ppn lambda)
s(u) + (uud + uud + udd + udd) -> d(u) + (uud + uud + udd + uds)
(u) is anti u
We need to explain which force mediates this reaction.
I am pretty sure it does not involve the weak force...