A 16-parts-per-trillion measurement of the antiproton-to-proton charge–mass ratio

A 16-parts-per-trillion measurement of the antiproton-to-proton charge–mass ratio

Nature, Published online: 05 January 2022; doi:10.1038/s41586-021-04203-w

Multiple high-precision measurement campaigns at CERN of the antiproton-to-proton charge-to-mass ratio—to a precision of 16 parts per trillion—in a cryogenic multi-Penning trap offer no evidence of charge–parity–time violation, and set stringent limits on the clock-weak-equivalence principle.
Source: Nature