Электронный каталог

Статья

Arnquist, I.J.
Exotic Dark Matter Search with the Majorana Demonstrator / I.J.Arnquist, S.Vasilyev, [a.o.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 132, No. 4. – P. 041001. – URL: https://doi.org/10.1103/PhysRevLett.132.041001. – Bibliogr.: 52.

With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the Majorana Demonstrator enable searches for several classes of exotic dark matter (DM) models. In this work, we report new experimental limits on keV-scale sterile neutrino DM via the transition magnetic moment from conversion to active neutrinos νs→νa. We report new limits on fermionic dark matter absorption (χ+A→ν+A) and sub-GeV DM-nucleus 3→2 scattering (χ+χ+A→ϕ+A), and new exclusion limits for bosonic dark matter (axionlike particles and dark photons). These searches utilize the (1–100)-keV low-energy region of a 37.5-kg y exposure collected by the Demonstrator between May 2016 and November 2019 using a set of 76Ge-enriched detectors whose surface exposure time was carefully controlled, resulting in extremely low levels of cosmogenic activation.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.1а - Свойства нейтрино