Search for the Cosmic Neutrino Background and KATRIN
Amand Faessler, Rastislav Hodak, Sergey Kovalenko, Fedor Simkovic

TL;DR
This paper explores the potential to detect the Cosmic Neutrino Background through induced beta decay using the KATRIN spectrometer, aiming to set limits on relic neutrino density despite current technological challenges.
Contribution
It proposes a method to detect relic neutrinos via beta decay and discusses modifications to the KATRIN spectrometer to improve detection prospects.
Findings
Potential to set upper limits on local relic neutrino density
Analysis of the feasibility of increasing Tritium source intensity
Discussion of the challenges in detecting cosmic neutrinos
Abstract
The spectrum of the Cosmic Microwave Background follows Planck's black body radiation formula and shows a remarkable constant temperature of T = 2.7. About 380 000 years after the Big Bang at a temperature of T = 3000 Kelvin in the matter dominated era the electrons combine with the protons and 4He and the photons move freely in the neutral universe. So the temperature and distribution of the photons give us information of the universe 380 000 years after the Big Bang. Information about earlier times can, in principle, be derived from the Cosmic Neutrino Background (relic neutrinos). The neutrinos decouple already about 1 second after the Big Bang at a temperature of around 1 MeV or 10^{10} Kelvin. Today their temperature is about 1.95 Kelvin. Registration of these neutrinos is an extremely challenging experimental problem, which can hardly be solved with the present technologies. On…
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Taxonomy
TopicsNeutrino Physics Research · Dark Matter and Cosmic Phenomena · Astrophysics and Cosmic Phenomena
