Gerald Gabrielse’s team at Northwestern published, on Wednesday 21 October, in Physical Review Letters: they trapped and cooled a single positron, the electron’s antimatter, in a quantum cyclotron. An experiment published. Not the discovery of a difference from the electron. Dump Nature.

Nature: they held it suspended, cooled to its lowest energy state, to measure the magnetic moment at a precision they hope is 10,000 times finer than for the proton and antiproton. A hope. Not the result. The Standard Model says mirrors; the Universe is matter. If a mismatch were found, “it would be revolutionary”, Gabrielse says. Conditional. It has not been found.

Northwestern, in a release: a wall-less trap, a near-perfect vacuum; the positron, for months, without touching matter. PRL: a 5.6-tesla field, electrodes at 300 millikelvin. Two details from the paper, not from Nature. Do not mix them with the measurement that has not yet come.

Barbara Maria Latacz, CERN: a remarkable achievement, a probe for physics beyond the model. Stefan Ulmer, Düsseldorf: he awaits the first precision measurements. Praise. Not a figure.

Myers, Soucy, Sukra, Sinha, Gabrielse. PRL 137, 173001. A capture. CPT is not broken.

Dump Nature. The rewrite rests on Nature and Northwestern.

Image: University Hall, Northwestern University, Evanston, 10 May 2008, Madcoverboy, CC BY-SA 3.0, Wikimedia Commons. The campus, not the Penning trap.

Sources consulted: Scientists trap and tame a single particle of antimatter for months — Northwestern University.