BeEST collaboration meeting 2025

Session

New Physics Searches with BeEST

May 14, 2025, 4:20 p.m.

Auditorium (TRIUMF)

131. BSM Physics Targets Beyond Heavy Neutral Leptons at BeEST

Douglas Tuckler (TRIUMF and Simon Fraser University)

2025-05-14, 4:20 p.m.

Oral invited talk

New physics coupled to neutrinos are well-motivated extensions of the SM, and could play a role in neutrino mass generation or mediating interactions between the SM and dark sectors. In this talk, we will explore the phenomenology of light neutrinophilic particles, and their signatures in electron capture experiments like BeEST.

136. Three-body decays in the BeEST

Leendert Hayen (LPC Caen)

2025-05-14, 4:40 p.m.

Oral invited talk

We will provide a status update of three-body decay searches in the BeEST data set, focusing on the anticipated sensitivity in the current data set.

134. Using BeEST data for limits on neutrino wavepacket sizes and other ideas

Joseph Smolsky (STAR Cryoelectronics)

2025-05-14, 5:00 p.m.

Oral contributed talk

The precision of the BeEST measurement can be used to study wavepacket sizes in 7-Be electron capture decays.  Predictions for wavepacket sizes vary widely based on the scale of localizing interactions and are largely unconstrained by data.  By using Heisenberg’s uncertainty principle and conservation laws, the BeEST measurement places the first experimental limit on the size of decay products...

110. Physics with the BeEST beyond sterile neutrinos

David Moore (Yale)

2025-05-14, 5:20 p.m.

Oral invited talk

I will describe some ideas for analyzing the $^7$Be recoil energy spectrum to search for physics other than sterile neutrinos with this data.