Details

Autor(en) / Beteiligte

• Brunst, T.
• Houdy, T.
• Mertens, S.
• Nozik, A.
• Pantuev, V.
• Abdurashitov, D.
• Altenmüller, K.
• Belesev, A.
• Bombelli, L.
• Chernov, V.
• Geraskin, E.
• Huber, A.
• Ionov, N.
• Koroteev, G.
• Korzeczek, M.
• Lasserre, T.
• Lechner, P.
• Likhovid, N.
• Lokhov, A.
• Parfenov, V.
• Siegmann, D.
• Skasyrskaya, A.
• Slezák, M.
• Tkachev, I.
• Zadorozhny, S.

Titel

Measurements with a TRISTAN prototype detector system at the “Troitsk nu-mass” experiment in integral and differential mode

Ist Teil von

• Journal of instrumentation, 2019-11, Vol.14 (11), p.P11013-P11013

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Sterile neutrinos emerge in minimal extensions of the Standard Model which can solve a number of open questions in astroparticle physics. For example, sterile neutrinos in the keV-mass range are viable dark matter candidates. Their existence would lead to a kink-like distortion in the tritium β-decay spectrum. In this work we report about the instrumentation of the Troitsk nu-mass experiment with a 7-pixel TRISTAN prototype detector and measurements in both differential and integral mode. The combination of the two modes is a key requirement for a precise sterile neutrino search, as both methods are prone to largely different systematic uncertainties. Thanks to the excellent performance of the TRISTAN detector at high rates, a sterile neutrino search up to masses of about 6 keV could be performed, which enlarges the previous accessible mass range by a factor of 3. Upper limits on the neutrino mixing amplitude in the mass range <5.6 keV (differential) and <6.6 keV (integral) are presented. These results demonstrate the feasibility of a sterile neutrino search as planned in the upgrade of the KATRIN experiment with the final TRISTAN detector and read-out system.