Proton

:For alternative meanings see proton (disambiguation).

Antiproton

The antiproton is the antiparticle of the proton. It was discovered in the year 1955 by Emilio Segre and Owen Chamberlain, for which they were awarded a 1959 Nobel Prize in Physics.

Related Topics:
Antiparticle - 1955 - Emilio Segre - Owen Chamberlain - 1959 - Nobel Prize in Physics

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

CPT-symmetry puts strong constraints on the relative properties of particles and antiparticles and, therefore, is open to stringent tests. For example, the charges of the proton and antiproton must sum to exactly zero. This equality has been tested to one part in 10-8. The equality of their masses is also tested to better than one part in 10-8. By holding antiprotons in a Penning trap, the equality of the charge to mass ratio of the proton and the antiproton has been tested to 1 part in 9×10-11. The magnetic moment of the antiproton has been found with error of 8×10-3 nuclear Bohr magnetons, and is found to be equal and opposite to that of the proton.

Related Topics:
CPT-symmetry - Antiparticles - Penning trap

~ ~ ~ ~ ~ ~ ~ ~ ~ ~