Search for a 33.9 MeV/c^2 Neutral Particle in Pion Decay
J. A. Formaggio, E. D. Zimmerman, T. Adams, A. Alton, S. Avvakumov, L., de Barbaro, P. de Barbaro, R. H. Bernstein, A. Bodek, T. Bolton, J. Brau, D., Buchholz, H. Budd, L. Bugel, S. Case, J. M. Conrad, R. B. Drucker, B. T., Fleming, R. Frey, J. Goldman, M. Goncharov
TL;DR
The paper reports a search for a hypothetical 33.9 MeV/c^2 neutral particle in pion decay, motivated by anomalies in neutrino timing, but finds no evidence, setting very stringent limits on its production.
Contribution
First experimental search for this specific neutral particle in pion decay, providing constraints on its existence and properties.
Findings
No evidence for the particle was observed.
The search sensitivity reached pion branching ratios as low as 10^-13.
Results constrain models predicting such a particle.
Abstract
The E815 (NuTeV) neutrino experiment has performed a search for a 33.9 MeV/c^2 weakly-interacting neutral particle produced in pion decay. Such a particle may be responsible for an anomaly in the timing distribution of neutrino interactions in the KARMEN experiment. E815 has searched for this particle's decays in an instrumented decay region; no evidence for this particle was found. The search is sensitive to pion branching ratios as low as 10^-13.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.