cern-summer-webfest/chapter/antimatter.html
2012-08-05 13:37:43 +02:00

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<h1>Antimatter</h1>
<p class="abstract">Every particle[ref] that we have met so far has a
corresponding anti-particle. These antiparticles have exactly the same
mass[ref] as the particle, but opposite charge[ref], and their
lifetime and stability are the same. When a particle, for example the
electron, meets its antiparticle, an anti-electron (or positron), they
will annihilate each other. This means that both particles disappear
and produce a huge amount of energy[ref]. This annihilation will only
occur when an antiparticle meets its matching partner. For example, an
antimuon will not annihilate with an electron. However, because there
is a lot more matter in our universe than antimatter, it is much more
likely for an antiparticle to find its partner very quickly and
annihilate. Hence, we do not see antiparticles very often in our
universe.</p>