A University of California Irvine press release promotes research into the decay of an isomer of the short-lived radioisotope beryllium-8.
Noting that
a 6.8σ anomaly has been reported in the opening angle and invariant mass distributions of e+ e- pairs produced in 8Be nuclear transitions,
physicists propose "a 17 MeV protophobic gauge boson" (for comparison, an electron's mass is 0.51 MeV) to explain the observations, saying that the particle's existence could also account for a "discrepancy in the muon anomalous magnetic moment." The force conveyed by the particle is believed to only affect electrons and neutrons, and only at short distances.
further information:
(Score: 2) by butthurt on Wednesday August 17 2016, @10:30AM
Sorry for the unexplained jargon. The story is about a hitherto unknown short-range force among electrons and neutrons. I meant to link the phrase "press release" in the first sentence; try the first link if you haven't.