UCLA Dark Matter 2023

Session

SESSION 8: Sterile Neutrinos (CHAIR: George Fuller- UCSD)

30 Mar 2023, 15:00

PAB- 1-425 (UCLA)

205. Astrophysical Constraints on Warm Dark Matter

Prof. Kevork N. Abazajian

30/03/2023, 15:00

Sterile neutrinos as dark matter

Talk

In the regime of linear growth of structure, dark matter dominates structure formation at all scales. On small scales, the thermal and kinetic properties of dark matter will alter the growth of structure at a finite scale that depends on the nature of dark matter. I will review the methods for constraining matter clustering on small scales, highlighting those most robust to modeling and data...

290. Search for keV-scale sterile neutrinos with KATRIN/TRISTAN

Andrew Gavin

30/03/2023, 15:20

Sterile neutrinos as dark matter

Talk

Sterile neutrinos are a natural extension of the Standard Model of particle physics. If their mass is in the keV range, they are a viable dark matter candidate. One way to search for sterile neutrinos in a laboratory-based experiment is via tritium beta decay, where they would manifest themselves as a characteristic spectral distortion. The direct neutrino mass experiment, KATRIN, provides...

314. The HUNTER Sterile Neutrino Search

Paul Hamilton (UCLA)

30/03/2023, 15:35

Sterile neutrinos as dark matter

Talk

The HUNTER experiment (Heavy Unseen Neutrinos from Total Energy-
momentum Reconstruction) uses missing-mass reconstruction of electron-capture beta decays to search for sterile neutrinos with masses in the 20-280 keV range. We study electron-capture decays of radioactive 131-Cs atoms, contained in a magneto-optical (laser) trap (MOT). The recoil 131-Xe nuclei and the Auger electrons will...

206. MAGNETO-ν: Searching for keV sterile neutrino dark matter in 241Pu beta decays

Geon-Bo Kim (LLNL)

30/03/2023, 15:50

Sterile neutrinos as dark matter

Talk

Sterile neutrino of keV-scale mass is one of strong dark matter candidates. One of the ways for observing “sterile” neutrino is using nuclear beta decays. Non-zero mixing of sterile neutrino to electron neutrino allows them being emitted in nuclear beta decays, which modifies the shape of beta decay spectrum by adding a 4-th spectral component with reduced end-point energy. This modification...