COUPP experiment tightens limits on dark matter

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Physicist Mike Crisler inspects the bubble chamber of the Chicagoland Observatory for Underground Particle Physics experiment. Credit: Fermilab
Physicist Mike Crisler inspects the bubble chamber of the Chicagoland Observatory for Underground Particle Physics experiment. Credit: Fermilab

Scientists working on the COUPP experiment at the Department of Energy’s Fermi National Accelerator Laboratory today announced a new development in the quest to observe dark matter. The Chicagoland Observatory for Underground Particle Physics experiment tightened constraints on the “spin-dependent” properties of WIMPS, weakly interacting massive particles that are candidates for dark matter. Their results, combined with the findings of other dark matter searches, contradict the claims for the observation of such particles by the Dark Matter experiment (DAMA) in Italy and further restrict the hunting ground for physicists to track their dark matter quarry.


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