{"id":791,"date":"2017-10-31T10:13:49","date_gmt":"2017-10-31T17:13:49","guid":{"rendered":"http:\/\/www.dereviankogroup.com\/?p=791"},"modified":"2017-10-31T10:20:13","modified_gmt":"2017-10-31T17:20:13","slug":"dark-matter-day-first-gps-dm-results","status":"publish","type":"post","link":"https:\/\/www.dereviankogroup.com\/dereviankogroup\/rightthere\/dark-matter-day-first-gps-dm-results\/","title":{"rendered":"Dark matter day and the first GPS.DM results"},"content":{"rendered":"

Well, apparently dark matter day<\/a> is a thing! And perfectly timed to this inaugural event is the publication of our first GPS.DM observatory results.\u00a0Happy dark matter day!<\/p>\n

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Search for domain wall dark matter with atomic clocks on board global positioning system satellites<\/a><\/h1>\n

Benjamin M. Roberts,Geoffrey Blewitt,\u00a0Conner Dailey,\u00a0Mac Murphy,\u00a0Maxim Pospelov,\u00a0Alex Rollings,\u00a0Jeff Sherman,\u00a0Wyatt Williams &\u00a0Andrei Derevianko<\/p>\n

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Nature Communications<\/i>\u00a08<\/b>, Article\u00a0number:\u00a01195<\/span> (2017<\/span>)<\/p>\n<\/div>\n

Abstract<\/strong><\/div>\n<\/div>\n<\/div>\n<\/header>\n
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Cosmological observations indicate that dark matter makes up 85% of all matter in the universe yet its microscopic composition remains a mystery. Dark matter could arise from ultralight quantum fields that form macroscopic objects. Here we use the global positioning system as a ~\u200950,000\u2009km aperture dark matter detector to search for such objects in the form of domain walls. Global positioning system navigation relies on precision timing signals furnished by atomic clocks. As the Earth moves through the galactic dark matter halo, interactions with domain walls could cause a sequence of atomic clock perturbations that propagate through the satellite constellation at galactic velocities ~\u2009300\u2009km\u2009s\u22121<\/sup>. Mining 16 years of archival data, we find no evidence for domain walls at our current sensitivity level. This improves the limits on certain quadratic scalar couplings of domain wall dark matter to standard model particles by several orders of magnitude.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n