Researchers announce dark matter detection


Nothing more detail-wise at the moment except this “press release” but:

“The Cryogenic Dark Matter Search (CDMS) project is announcing on Friday 18th December, the possible detection of two dark matter particles. However, the chances of a false positive seem to be 23%, which is rather high compared to the threshold of 5% which is usually employed in measurement science, and in fact many particle physicists require the probability of a false positive to be much lower still before they are willing to treat an event as a genuine discovery.

The CDMS detector resides in an abandoned iron mine in Minnesota, (to minimise the background neutron radiation from cosmic rays), and consists of germanium discs cryogenically cooled to an extremely low temperature. The discs are coated with phonon sensors, designed to detect the tiny vibrations in such a crystalline solid. When the crystals are cooled to a very low temperature, the vibrational background of the solid is virtually eliminated, and it is possible to detect the phonons created by incoming particles colliding with the atoms in the solid. “

Read the full article here.

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Episcopal bishop, dad, astronomer, erstwhile dancer...