The marked one asks "How can the unstable particles of the standard model be considered particles in their own right if they immediately decay into stable particles?"
and the suggested original "What is the essential difference between a resonance and a particle? "
The answers to the last do not address the problem. The Z and W mesons are more than resonances, they are elementary particles of the standard model . The "duplicate" asks if the elementary particles could be excitations .
Two different problems.
Could the moderators have a look?
Edit: question is open with votes. see my comment below