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Project for Direct Search for Dark Mater with Paleo-Detectors

Direct Search for Dark Mater with Paleo-Detectors

Although dark matter occupies about a quarter of the universe, its true nature remains elusive. This project attempted to detect dark matter directly with the ‘paleo detector’ technique, using minerals as detectors. Minerals may contain traces of interaction with dark matter over extended periods of geological time. Detection of these traces may allow a direct search for dark matter even with small sample sizes. This project conducted research on mantle-derived olivine, which was collected from the deep seafloor, was shielded from cosmic rays and had a low concentration of radioactive elements and low noise.


様々なカンラン石に含まれる微量元素の存在度(C1コンドライトで規格化)。

マリアナ海溝で採取したレールゾライトから分離したカンラン石。