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annihilation
(redirected from Annihiliation)

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annihilation

In physics, a reaction in which a particle and its antiparticle (see antimatter) collide and disappear. The annihilation releases energy equal to the original mass m multiplied by the square of the speed of light c, or E = mc2, in accordance with Albert Einstein's special theory of relativity. The energy can appear directly as gamma rays or can convert back to particles and antiparticles (see pair production).

annihilation [ə‚nī·ə′lā·shən]
(particle physics)
A process in which an antiparticle and a particle combine and release their rest energies in other particles.
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On the darker side were persisting crises--poverty, hunger, debt, inequities among individuals and nations, and the spectre of nuclear annihiliation.
The nations speak: general debate, 1985 by UN Chronicle
On the other hand, if there is at least one stable shadow particle that has mass, does not decay and avoids annihiliation, it could be that relict shadow matter contributes a good deal to the present gravitational dynamics of the universe.
Shadow matter by Thomsen, Dietrick E. / Science News
 
 
 
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