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• W2964174013 startingPage "053022" @default.
• W2964174013 abstract "Abstract Sterile neutrinos in the keV mass range may constitute the galactic dark matter. Various proposed direct detection and laboratory searches are summarized. It is suggested that a promising method for searching for keV sterile neutrinos in the laboratory is complete energy-momentum reconstruction of individual beta-decay or K-capture events, by measuring the vector momentum of all decay products from atoms suspended in a magneto-optical trap. Reconstruction of the ‘missing mass’ would isolate any keV-range sterile neutrinos as a separated population. A survey of suitable nuclides is presented, together with the measurement precision required in a typical experimental configuration. Among the most promising are the K-capture nuclides 131 Cs, which requires measurement of an x-ray and several Auger electrons in addition to the atomic recoil, and 7 Be which has only a single decay product but needs development work to achieve a trapped source. A number of background effects are discussed. It is concluded that, with current time-of-flight precision, sterile neutrinos with masses down to the 10 keV region would be detectable with relative couplings 10 −5 –10 −6 in a 1–2 year running time, and with foreseeable future upgrades eventually able to reach coupling levels down to 10 −10 –10 −11 using high-population trapped sources." @default.
• W2964174013 created "2019-07-30" @default.
• W2964174013 creator A5019784399 @default.
• W2964174013 date "2019-05-01" @default.
• W2964174013 modified "2023-10-17" @default.
• W2964174013 title "Proposed experiments to detect keV-range sterile neutrinos using energy-momentum reconstruction of beta decay or K-capture events" @default.
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• W2964174013 doi "https://doi.org/10.1088/1367-2630/ab1502" @default.
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