antiparticle


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antiparticle

 [an″tĭ-pahr´tĭ-k'l]
either of a pair of elementary particles that have electric charges and magnetic moments of opposite sign and are the same in all other properties, such as mass, lifetime, and spin, e.g., the electron and positron. Every particle has an antiparticle. When antiparticles collide, they are annihilated, and their mass is converted to energy in the form of gamma rays.
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The concept of antiparticles in nature means that, as a dialectical necessity all particles must have or be their own antiparticles.
It would be appealing if we could show that the universe started with a balanced number of particles and antiparticles and that the fact that we observe more particles now can be explained in the process of evolution of the universe," he said.
For the free-space electron and proton and their antiparticles, the results of the previous paragraph suggest that their coupling forces should be
If particle interactions are thought of as a movie, CPT symmetry requires that whatever physics occurs during the show must be the same when the film is run forward or backward (time), viewed through a mirror (parity) and when replacing each particle by its antiparticle (charge).
2)] = +2e|3, for instance, identify quarks whereas the inverted signs identify the corresponding antiquarks: likewise exist as a particular case particles with either integer charge whose antiparticles have either opposite charge.
16), have recently found an unexplained excess of certain lower-energy cosmic rays- electrons and their antiparticle, positrons--in the Milky Way.
So, we are modeling our system as being on a lattice with the spin along the field as representing a particle and spin opposite to the field representing an antiparticle.
Two WIMPs meeting and annihilating each other could produce a spray of particle and antiparticle pairs, such as positrons and electrons.
What we discuss for the particle states works for the antiparticle states, too.
An incoming gamma ray that collides with a tungsten atom converts into an electron and its antiparticle, the positron.
flow model for elementary particle fermions, the lepton or quark P is by a bouquet [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], and an antiparticle [bar.