It wasn’t going to happen.
For thirty years, the physics community had to deal with it. An outlier. A ghost signal.
In 1997 the DAMA experiment said they found something. A seasonal wiggle in the data. Earth moving through dark matter. Simple idea. Elegant. But every other lab looking for the same thing said “nope.” Silence from the void. DAMA kept reporting the same pattern for decades. DAMA/LIBRA joined in. The anomaly stubbornly persisted. 🧩
Physics is messy when everyone agrees on a theory but one lab insists reality disagrees.
Two new teams decided enough was enough. They built ANAIS-112. And COSINE-100. Sister experiments. Same method. Same salt. Sodium iodide crystals, just like DAMA. The logic is hard to argue with. If dark matter is hiding there it should show up here too.
2021 came. ANAIS-112 spoke up. No wiggle. The signal wasn’t there. It was a blow. Not fatal for DAMA perhaps, but damaging.
Now the verdict is final.
A new paper in Physical Review Letters merges the datasets. ANAIS plus COSINE. The stats are clear. There is no annual modulation consistent with dark matter. The probability is too low to ignore. The claim is dead.
Same detector design. Different result. That matters. It closes a loop that has been open since the nineties. The DAMA team can try to argue background noise. They can suggest unknown nuclear physics. But the field can finally move on without carrying that anchor. ⚓
The combined result rules out the DAMA/LIBRA interpretation at greater than 5 sigma significance.
It doesn’t explain what DAMA actually saw. Probably radiation. Maybe experimental quirks. We might never know.
That’s fine.
Uncertainty is part of science. Sometimes the anomaly is just an anomaly. The heavy lifting continues. Direct detection keeps searching for WIMPs. Other models are in play. But one specific ghost? Gone.
We’ll look back and wonder why we cared so much. Then we’ll find the next one.
