Can we really detect relic neutrinos?

SciPost Physics Proceedings

Abstract

Detecting relic neutrinos is a longstanding goal in fundamental physics. Experimentally, this goal is extremely challenging as the required energy resolution is defined by the tiny neutrino masses ( \sim ∼ 10 meV). The current consensus is that sufficient statistics together with a clean spectrum could only be achieved if beta decayers are attached to a solid state substrate. However, this inevitably imposes irreducible intrinsic limitations on the energy resolution coming from Heisenberg’s uncertainty principle. This limitation appears to be critical for the currently accepted decayer - Tritium. Here, we analyze the state of the art approaches to mitigate this limitation and conclude that the most promising solution is to change Tritium for a heavier emitter. We find that the two suitable candidates are ^{171} 171 Tm, ^{63} 63 Ni.

Authors 4

1. Yevheniia Cheipesh Aachen Instituut-Lorentz

   Leiden University

   Affiliation as printed

   Leiden University

   Instituut-Lorentz, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands

2. Ivan Ridkokasha Aachen Instituut-Lorentz

   Leiden University

   Affiliation as printed

   Leiden University

   Instituut-Lorentz, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands

3. Vadim Cheianov Aachen Instituut-Lorentz

   Leiden University

   Affiliation as printed

   Leiden University

   Instituut-Lorentz, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands

4. Alexey Mikhajlovich Boyarsky Aachen Instituut-Lorentz

   Leiden University

   Affiliation as printed

   Leiden University

   Instituut-Lorentz, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands