Search for Magnetic Monopoles in Polar Volcanic Rocks
For a broad range of values of magnetic monopole mass and charge, the abundance of monopoles trapped inside Earth would be expected to be enhanced in the mantle beneath the geomagnetic poles. A search for magnetic monopoles was conducted using the signature of an induced persistent current following...
Published in: | Physical Review Letters |
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Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2013
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Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/search-for-magnetic-monopoles-in-polar-volcanic-rocks(634d7059-3cbf-41ff-a1f8-89dcc63a632a).html https://doi.org/10.1103/PhysRevLett.110.121803 |
Summary: | For a broad range of values of magnetic monopole mass and charge, the abundance of monopoles trapped inside Earth would be expected to be enhanced in the mantle beneath the geomagnetic poles. A search for magnetic monopoles was conducted using the signature of an induced persistent current following the passage of igneous rock samples through a SQUID-based magnetometer. A total of 24.6 kg of rocks from various selected sites, among which 23.4 kg are mantle-derived rocks from the Arctic and Antarctic areas, was analyzed. No monopoles were found, and a 90% confidence level upper limit of 9.8 x 10(-5)/g is set on the monopole density in the search samples. DOI:10.1103/PhysRevLett.110.121803 |
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