February 11, 2013
Searching for the Elusive Magnetic Monopole
Ian Randall, Physics World
The first search for magnetic monopoles in mantle-derived polar igneous rocks – thought to be likely to contain a higher ratio of monopoles to matter – has been conducted by researchers in Switzerland. The team analysed 23.4 kg of samples from Arctic and Antarctic regions. While no monopoles were found, the monopole to nucleon ratio in the search samples was constrained, with a 90% confidence level, to an upper limit of 1.6 monopoles per 10^28 nucleons. The team claims that its study, which adds to existing matter-bound monopole searches, has comparable or better sensitivity than the most extensive meteorite search to date.
TAGGED: Magnetic monopoles