Publications by authors named "M Ave"
Article Synopsis
- - The DarkSide-50 experiment searched for dark matter particles with masses below 1 GeV/c² that interact to produce electrons using a substantial exposure of low-radioactivity liquid argon.
- - They analyzed the ionization signals to rule out certain interactions between dark matter and electrons, providing new limits on various parameters like the dark matter-electron cross section and other coupling constants.
- - This study also established the first direct-detection constraints for keV/c² sterile neutrinos, particularly focusing on the mixing angle related to these particles.
Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-GeV/c^{2} mass dark matter. We present new constraints for sub-GeV/c^{2} dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of (12 306±184) kg d.
View Article and Find Full Text PDFCerro de Pasco, Peru, has been excessively contaminated with heavy metals due to high mining activities in the region. We investigated the presence of chronic exposure to heavy metals in children living in Cerro de Pasco and its effect on health. Heavy metal concentrations were determined in hair samples collected from 78 children living in a region exposed to an open-pit mine (Paragsha region) and from other 16 children unexposed to mine activities (Carhuamayo region).
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- * Standardized extraction methods have improved the reliability of VH sample analysis, and factors like light exposure and temperature can significantly affect the results, particularly for potassium, sodium, and chloride levels.
- * To ensure accurate analysis, it is advised to freeze VH samples for storage if there is a delay, and to minimize exposure to light and varying temperatures during the analysis process.
We present new constraints on sub-GeV dark-matter particles scattering off electrons based on 6780.0 kg d of data collected with the DarkSide-50 dual-phase argon time projection chamber. This analysis uses electroluminescence signals due to ionized electrons extracted from the liquid argon target.
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