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Antimatter Studies Information1 #722579 The "mirror image" of the matter which forms almost all of the observable Universe. Just as matter is composed of particles, antimatter is composed of antiparticles.

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The Infinite Passport Glossary »The Infinite Passport GlossaryThe Infinite Passport Glossary☜Translated from the Passeport pour les deux infinis, IN2P3/Dunod, https://pass2i.ijclab.in2p3.fr/ (French); updated with ICHEP2024 conference (https://ichep2024.org) for IPPOG☜F1CEB7

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Matter Constituents »Matter ConstituentsMatter Constituents☜Large groups of atoms or molecules form the bulk matter of everyday life. Depending on temperature and other conditions, matter may appear in any of several states: solids, liquids, gases, and plasmas. At the most fundamental level, however, matter is composed of elementary particles known as quarks and leptons. ☜FFB597

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Antimatter StudiesAntimatter Studies☜The mirror image of the matter which forms almost all of the observable Universe. Just as matter is composed of particles, antimatter is composed of antiparticles. ☜9FDDBE

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Anti-hydrogen »Anti-hydrogenAnti-hydrogen☜The simplest anti-atom: the anti-hydrogen nucleus is an antiproton, around which one single antielectron orbits. Its properties are studied in details at CERN, in the Antiproton Decelerator (AD) facility: very low energy antiprotons and anti-electrons are combined and stored in magnetic traps in the center of experiments which verify if the laws of physics are the same as for atoms. ☜D3ABAB

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Matter-antimatter Asymmetry »Matter-antimatter AsymmetryMatter-antimatter Asymmetry☜The Big Bang should have created equal amounts of matter and antimatter in the early universe. Matter and antimatter particles are always produced as a pair and, if they come in contact, annihilate one another, leaving behind pure energy. But today, everything we see from the smallest life forms on Earth to the largest stellar objects is made almost entirely of matter. One of the greatest challenges in physics is to figure out why.☜D3ABAB

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Positron Beams »Positron BeamsPositron Beams☜The antiparticle of the electron is the first antimatter particle to have been predicted (by Dirac in 1927) then discovered (by Anderson in 1932). The electron and the positron share many properties (e.g. their mass), but have opposite electric charges. Positrons are used in medical application (PET) and can be accelerated as beams to produce electron-positron collisions. ☜D3ABAB

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Antiparticle »AntiparticleAntiparticle☜The theory describing the infinitely small states that each particle is associated with a mirror particle, called antiparticle. This has been confirmed by experiments. A particle and its antiparticle share many properties. In particular, they have the same mass but have opposite charges. If enough energy is available, particle-antiparticle pairs can be produced. But the antiparticle will annihilate if it crosses matter.☜00CFE4

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Redagavo: Claire Adam
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