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annihilation

In particle physics, annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles, such as an electron colliding with a positron to produce two photons. The total energy and momentum of the initial pair are conserved in the process and distributed among a set of other particles in the final state. Antiparticles have exactly opposite additive quantum numbers from particles, so the sums of all quantum numbers of such an original pair are zero. Hence, any set of particles may be produced whose total quantum numbers are also zero as long as conservation of energy and conservation of momentum are obeyed.During a low-energy annihilation, photon production is favored, since these particles have no mass. However, high-energy particle colliders produce annihilations where a wide variety of exotic heavy particles are created.
The word "annihilation" takes use informally for the interaction of two particles that are not mutual antiparticles – not charge conjugate. Some quantum numbers may then not sum to zero in the initial state, but conserve with the same totals in the final state. An example is the "annihilation" of a high-energy electron antineutrino with an electron to produce a W−.
If the annihilating particles are composite, such as mesons or baryons, then several different particles are typically produced in the final state.

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  1. Arcturus Dinn

    Private  Progressive Annihilation

    Well, this wasn't Korriban. Certainly it wasn't the Netherworld. Yet he was here all the same. And he wasn't alone, either. As he made his way through the frigid landscape of Salis Sterili, the one who had accompanied him on this venture showed no signs of experiencing the blistering cold that...
  2. Darth Solipsis

    Annihilation  Head of the Snake: BotM Annihilation of Csilla

    In the northern Unknown Regions, the savage Brotherhood of the Maw has seen conquest after conquest. The Croke, the Lugubraa, the Shi'ido, the Gundanbard, the Jin, even the mighty Sorcerers of Rhand, all have either bowed before them or been swept aside by a tide of blood and fire. To the west...
  3. Halketh

    Soothsayer

    A B Y S S H A L K E T H // 0231 HOURS LOCAL TIME // CARLAC A ragged, choked gasp clawed its way from his throat in the dark, ushering in a staggered strain of breath, the likes of which moved too quickly for him to give chase. Sweat-damp hair clung to his glistening brow as he shot...
  4. Auteme

    This Ain't No Place for No Hero

    Written with the help of the most excellent Ryv SHORT CHANGE Cold. Frost; a coat of white snow, hiding a fire beneath. The heat of her breath became wisps in the clear air. It was crisp in her lungs, yet still she held that warmth of life. For a moment the glaciers ahead were silent. An...
  5. Rebirth

    Annihilation  Head of the Snake | BotM Annihilation of Csilla - OOC Thread

    In the northern Unknown Regions, the savage Brotherhood of the Maw has seen conquest after conquest. The Croke, the Lugubraa, the Shi'ido, the Gundanbard, the Jin, even the mighty Sorcerers of Rhand, all have either bowed before them or been swept aside by a tide of blood and fire. To the west...
  6. The Messenger

    Faction Ad  Guide to the Brotherhood of the Maw

    What is the Brotherhood of the Maw? We represent the spiritual successors to the Nihil of the High Republic and the collection of many Dark Side tropes gathered together to form an active confederation of wasteland warlords, marauders, and zealous cultists bent on burning down the galaxy. Our...
  7. Darth Solipsis

    Faction Ad  Brotherhood of the Maw

    'Nuff Said Faction Page Check out our Discord
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