First results from LHAASO place tighter constraints on dark matter's lifetime

New limits on the lifetime of heavy dark matter particles have been calculated by scientists from the Large High Altitude Air shower Observatory.

There wereConstraints on heavy decaying dark matter from 570 days of observations in the study.

The model of the Milky Way shows that there is a high density of dark matter in the center of the universe, and that the decay of this dark matter will cause a lot of light-years to go by. The presence of other background radiation has made it difficult to observe ultra-high-energy gamma rays.

Thanks to its high detection sensitivity, LHAASO has the ability to observe the decay of high-energy gamma rays. It is possible to eliminate background events by more than six orders of magnitude above 100 TeV.

Some of the strongest limits for the lifetime of heavy dark matter have been reached by using data from the KM2A subarray. The limit is higher than in the past. The PeV mass dark matter has a lifetime of at least ten years.

There are other experiments in the search for dark matter that use the same observations. The limit will be increased as the full array operates.

There are Constraints on Heavy Decaying Dark Matter from 570 days of observations. There is a book titled "PhysRevLett.129.261103."

Journal information: Physical Review Letters