antimatter
反物质,反物質,反对派
Definitions
- 1
Physics.
- : matter composed only of antiparticles, especially antiprotons, antineutrons, and positrons.
Examples
A team of physicists is now claiming the first direct observation of the long-sought Breit-Wheeler process, in which two particles of light, or photons, crash into one another and produce an electron and its antimatter counterpart, a positron.
From this spinning stellar husk, a “wind” of electrons and their antimatter partners blows outwards at a respectable percentage of the speed of light.
To get closer to the answer, we have studied a process where matter transforms into antimatter and vice versa.
For instance, electrons have antimatter twins called positrons.
Then they compared that with the reconstructed digital images of the transparencies, creating a new, antimatter picture they called a “compensation image.”
Instead, dark matter is its own antimatter, so any pair of particles that meet will destroy each other.
The distribution was unequal of course; antimatter could not exist in contact with ordinary matter.
On the average, one atom out of every ten million in the universe was an atom of antimatter.