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A novel detector system for KATRIN to search for keV-scale sterile neutrinos

  • Mertens, Susanne
  • Alborini, Antonio
  • Altenmüller, Konrad
  • Bode, Tobias
  • Bombelli, Luca
  • Brunst, Tim
  • Carminati, Marco
  • Fink, David
  • Fiorini, Carlo
  • Houdy, Thibaut
  • Huber, Anton
  • Korzeczek, Marc
  • Lasserre, Thierry
  • Lechner, Peter
  • Manotti, Michele
  • Peric, Ivan
  • Radford, David C.
  • Siegmann, Daniel
  • Slezák, Martin
  • Valerius, Kathrin
  • And 2 more
Publication Date
Oct 15, 2018
Submission Date
Oct 15, 2018
DOI: 10.1088/1361-6471/ab12fe
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Sterile neutrinos are a minimal extension of the Standard Model of Particle Physics. If their mass is in the kilo-electron-volt regime, they are viable dark matter candidates. One way to search for sterile neutrinos in a laboratory-based experiment is via tritium-beta decay, where the new neutrino mass eigenstate would manifest itself as a kink-like distortion of the $\beta$-decay spectrum. The objective of the TRISTAN project is to extend the KATRIN setup with a new multi-pixel silicon drift detector system to search for a keV-scale sterile neutrino signal. In this paper we describe the requirements of such a new detector, and present first characterization measurement results obtained with a 7-pixel prototype system.

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