Alpha-Particle Condensate Structure of the Hoyle State: where do we stand?

The present understanding of the structure of the Hoyle state in(12)C is reviewd. It is pointed out that a crucial test of any theory is the good reproduction of the experimental results for the inelastic form factor from ground to the Hoyle state. The performances of the so-called THSR wavwe function are outlined confirming the α particle condensation hypothesis proposed 15 years back in [1].