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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. Darth Solipsis

    Annihilation  Shatterpoint | BotM Annihilation of GA Held Tython

    Site Administrator: Tefka Annihilation Duration: April 15th - May 15th Attackers Defenders Brotherhood of the Maw and the New Sith Order Darth Solipsis Jem Fossk The Mongrel Darth Caelitus Tu'teggacha Kralmus Orr Darth Mori Khamul Kryze Kyrel Ren Zachariel Steelblood Darth Ptolemis...
  2. The Mongrel

    Major Faction Countdown to Annihilation: Tython

    On April 15th Join the battle for Tython
  3. Romul Saxon

    Wrath of Mandalore - Road to Tython

  4. Heinrich Faust

    The Road to Tython - Heinrich Faust

    Thanks again to Annasari for the template!
  5. Valery Noble

    The Road to Tython — Valery Noble

    Ignited in the battles on Jedha and Adrathorpe, the fire in the heart of Valery Noble burns brighter than ever before as darkness pierces into the very heart of the Alliance. With her home on Empress Teta ravaged by the Maw, the violet guardian turns her gaze to an imminent battle unlike any...
  6. Darth Solipsis

    Major Faction Twin Fates | Road to Tython

    Under Bogan's gaze the Brotherhood march, their reach extending into the Core Worlds intent on scrubbing out the Jedi Order from the history books and dealing a grevious blow to their enemies in the Galactic Alliance. Selvaris falls under siege, Xa Fel make ready, and Teta is put at risk. There...
  7. Ishani Dinn

    End of an Era (short story)

    During the attempted annihilation of Korriban… Ishani was leaving the library, her arms laden with books, when something made her halt. An eerie silence seemed to have descended upon the empty corridors of the Academy, like the calm before a storm. She hadn’t noticed it that morning, as she had...
  8. Jackal bloodfur

    Attack On Kiros

    The false jedi make an attack on Kiros. A jedi master know as "jackal bloodfur" and another fake jedi knight knoen as the "great Norrr Vakeaa" make there historical attack on kiros together. and people who defend it are "Urail Gau" the bounty hunter and "Jho'Henig" the smuggler them together as...
  9. Darth Solipsis

    Major Faction All Roads Lead To This…

    Shrouded in myth, Tython is as beautiful as it is ancient and even more so, deadly. Secluded in the Deep Core, the terrestrial world was once visited by the great pyramid ships known as the Tho Yor which brought pilgrims from across the galaxy to harness the Force. These devotees of the Force...
  10. Cedric Grayson

    Public  Refrain | Post-Korriban Annihilation Thread

    Dreshdae Deciding whether their assault on Korriban was a victory or not came down to the individual. On paper, their objectives were more or less achieved. The forces of the Sith empire were hunted down, many imprisoned, others killed, and the places of knowledge on the accursed world purged...
  11. Valiens Nantaris

    Annihilation  End of an Era: AC Annihilation of Korriban - Results

    Here again we have the second Annihilation for the forum. This one was a much less frenetic affair, but has provided a good second data point for our analysis of this thread type. In the end despite some good writing the judges felt the thread was quite conclusive. Drama: An easy result...
  12. Heinrich Faust

    Major Faction Korriban Must be Cleansed!

    Join the Ashlan Crusade today, and help us purge the Darkness from the galaxy!
  13. Heinrich Faust

    Annihilation  End of an Era: AC Annihilation of Korriban

    The house of cards has finally collapsed. One by one, each of the Sith states have fallen in upon themselves, pressures from within and without proving to be too much for the disparate nations that once claimed sovereignty over the east. Some worlds sought independence, whilst others descended...
  14. Darth Solipsis

    Special Project PK-2: "Cosmos Cleanser"

    OUT OF CHARACTER INFORMATION Intent: To provide a superweapon for use in the Annihilation of Korriban for accidental storyline plot of Ashlan Crusade and future Annihilations if it is not destroyed. Image Source: Businessinsider.com Tour an Ex-US Nuclear Missile Silo article, edited by myself...
  15. Cedric Grayson

    Annihilation  End of An Era | AC Annihilation of Korriban - OOC Thread

    The Sith are beaten, but in time they will return. This has often been the creed by which the great powers that have undone the Sith in the past have lived by; the threat is over, but not extinguished. The conflict, while quieted for now, ever remains. The Crusaders of the Ashlan Goddess are not...
  16. Heath Valhoun

    Minor Faction Declaration Regarding The Destruction of Csilla

    The Holorecording began with the Purple Lion of The Elysium Empire, which faded to show King Heath Valhoun with a somber look on his face. He was sitting in a wooden chair with his trademark Blue Trench coat on. This holorecording was being broadcast throughout the galaxy on several channels...
  17. Bernard

    Celebrating Csilla, Chaos' First Annihilation!

    In honour of the first-ever successful Annihilation thread on Chaos, and of a generally amazing event, I spent some time cooking up these rank bars for y'all who wrote to make it awesome! Enjoy! BROTHERHOOD OF THE MAW https://i.imgur.com/3lPJrCD.gif WARLORDS OF THE SITH...
  18. Taeli Raaf

    Approved Tech  Maw of Annihilation

    OUT OF CHARACTER INFORMATION Intent: To submit a special event booster set for Age of Chaos based on the recent Annihilation thread Image Source: N/A for submission Card arts can be found here Canon Link: N/A Permissions: N/A Primary Source: Age of Chaos: A Galactic Card Game Galaxy at War...
  19. Thalia Senn

    Public  The Beginning of the End

    Outlander Station - Several Hours After Csilla Inscident Thalia didn't need a holoscreen to tell her that billions had died on the far-off world of Csilla. She had felt it in the Force as it happened. Likely every Force Sensitive person in the Galaxy felt something. The sea, it was raging...
  20. Valiens Nantaris

    Annihilation  Head of the Snake | BotM Annhilation of Csilla | Results

    As the Admin presiding over the first Annihilation on this site it was a daunting challenge for myself and my judges, and we thank you for your patience. The result was close, but in the end we are happy with what has happened. Story: Both sides put up a fantastic fight. The attackers and...
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