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June 9, 2025 to July 12, 2025
Lead/Deadwood Middle School
US/Mountain timezone

TALK: Revisiting Reactor Anti-Neutrino 5 MeV Bump with 13C Neutral-Current Interaction

Jun 30, 2025, 10:45 AM
45m
Lead-Deadwood Elementary

Lead-Deadwood Elementary

Speaker

Seodong Shin (Jeonbuk National University)

Description

Speaker: Seodong Shin
Abstract: For the first time, we comprehensively examine the potential of a neutral current interaction of reactor neutrino with
C
emitting a 3.685 MeV photon to identify the origin of the 5 MeV bump in reactor antineutrino spectra observed through the inverse beta decay (IBD) process. This anomaly may be due to new physics, reactor antineutrino flux inaccuracies, or IBD systematics.
The 3.685 MeV photon released during the de-excitation of
C to its ground state is observable in
liquid scintillator detectors. Remarkably, we confirm the powerfulness of our proposal by completely ruling out a new physics scenario explaining the bump from the existing NEOS data. We also explore the potential of current and forthcoming experiments, including solar neutrino studies at JUNO, pion and muon decay-at-rest experiments at OscSNS, and isotope decay-at-rest studies at Yemilab, to measure the cross section precisely enough to distinguish the expected bump and the theoretical flux models via our channel.

Presentation materials