antiparticle

That leaves CPT symmetry: the equivalent of what you would see if you watched a movie that starred antiparticles run backward in a mirror.

Clearly, many of these antiparticles must be annihilated when they meet particles of ordinary matter.

Some radioactive substances emit positrons, the antiparticles to electrons, and are used in PET (positron-emission tomography) scans.

Particles and antiparticles could still collide, however, since gravitational repulsion is much weaker than electrical attraction.

DIRECT TESTS FOR CPT violation can be performed by comparing properties of particles and antiparticles .

Paul Dirac's theory has been experimentally verified and today a wide range of antiparticles have been detected.

The symmetry between particles and antiparticles is woven deep into the foundations of physics.

Another major problem in cosmology is what has caused the universe to contain more particles than antiparticles.

The scientists also want to compress large clouds of antiparticles into high-density clumps that can be tailored for practical applications.

One notion regarding dark matter particles suggests they have antiparticles, meaning they annihilate each other on contact.

In the same way the proton and neutron should also have their corresponding antiparticles.

the convention for antiparticles uses such time-reversed arrows.

Another idea suggests that dark matter particles are their own antiparticles.

Antimatter is matter that is composed of the antiparticles of those that constitute normal matter.

Fewer than zero particles being present usually means that you have antiparticles instead.

Charge reversal is the replacement of all particles with antiparticles.

These beams provide new ways to study how antiparticles interact or react with ordinary matter.