Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 // Session D00

Topics:

Searching for keV-mass Sterile Neutrinos with HUNTER

Poster 124

Presenter: Victoria M Palmaccio (Temple University)

Authors: Jeff Martoff (Temple University), Peter Smith (UCLA), Paul Hamilton (UCLA), Eric Hudson (UCLA), Christian Schneider (UCLA), Eddie Chang (University of California, Los Angeles), Sami Khamis (University of California, Los Angeles), Peter Meyers (Princeton University), Guy Ron (Hebrew University of Jerusalem), Francesco Granato (Temple University), Xunzhen Yu (Temple University), Frank Malatino (University of Houston)

Collaboration: HUNTER

The HUNTER experiment (Heavy Unseen Neutrinos from Total Energy-momentum Reconstruction) uses missing-mass reconstruction to search for sterile neutrinos with masses in the 20-280 keV range. Radioactive 131-Cs contained in a magneto-optical trap undergoes electron capture decay, giving only low-energy products- a recoil 131-Xe ion, an x-ray, Auger electron(s), and the neutrino. All the charged decay products are detected with high solid angle efficiency and high resolution using Reaction-Ion Microscope spectrometers, and x-rays are detected with position-sensitive thin scintillator arrays. Currently, an experiment to trap the first ever Cs-131 MOT and measure its hyperfine structure is taking place. I will present on the progress of the experiment and future plans of completing a neutrino asymmetry experiment where we will measure the directional asymmetry of the recoil nuclei produced in K-capture on polarized Cs-131 nuclei.

Funding acknowledgement

We thank the W. M. Keck Foundation, the NSF Foundation (2309364), the Gordon and Betty Moore Foundation, and our respective universities for financial support of HUNTER.

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