Research NewsPhysics

Improbable Particles—or Artifacts?

Science  03 Jan 1997:
Vol. 275, Issue 5296, pp. 30-31
DOI: 10.1126/science.275.5296.30

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Over the past year, one of the four huge detectors on the Large Electron-Positron Collider at CERN, the European Center for Particle Physics, has picked up 18 unusual events. Marked by debris that forms four jets and has an unusual pattern of masses, the events don't fit into any known physics, but they are so tantalizing that, so far, physicists can't write them off.