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- Antimatter - CERN
science physics antimatter Antimatter Antimatter Paul Dirac (Image: Wikimedia) In 1928, British physicist Paul Dirac wrote down an equation that combined quantum theory and special relativity to describe the behaviour of an electron moving at a relativistic speed
- Storing antihydrogen - CERN
And because antimatter annihilates in a flash of energy when it interacts with regular matter, storing it presents a challenge Creating Antihydrogen The antimatter counterpart to the simplest atom, hydrogen, is a neutral antihydrogen atom, which consists of a positively charged positron orbiting a negatively charged antiproton
- The matter-antimatter asymmetry problem - CERN
The matter-antimatter asymmetry problem The Big Bang should have created equal amounts of matter and antimatter So why is there far more matter than antimatter in the universe? The Big Bang should have created equal amounts of matter and antimatter in the early universe
- ALPHA experiment at CERN observes the influence of gravity on antimatter
Isaac Newton's historic work on gravity was apparently inspired by watching an apple fall to the ground from a tree But what about an “anti-apple” made of antimatter, would it fall in the same way if it existed? According to Albert Einstein’s much-tested theory of general relativity, the modern theory of gravity, antimatter and matter should fall to Earth in the same way But do they
- The Antiproton Decelerator - CERN
The Antiproton Decelerator (AD) is a unique machine that produces low-energy antiprotons for studies of antimatter, and “creates” antiatoms A proton beam coming from the PS (Proton Synchrotron) is fired into a block of metal These collisions create a multitude of secondary particles, including lots of antiprotons
- L’antimatière - CERN
physics antimatter L’antimatière L’antimatière Paul Dirac, qui a prédit l'existence des antiparticules (Image : Fondation Nobel) En 1928, le physicien britannique Paul Dirac formulait une équation combinant la théorie quantique et la relativité restreinte pour décrire le comportement d’un électron se déplaçant à une vitesse
- Probing dark matter using antimatter - CERN
Dark matter and the imbalance between matter and antimatter are two of the biggest mysteries of the universe Astronomical observations tell us that dark matter makes up most of the matter in the cosmos but we do not know what it is made of On the other hand, theories of the early universe predict that both antimatter and matter should have been produced in equal amounts, yet for some reason
- A new piece in the matter–antimatter puzzle - CERN
Update 16 July 2025 The paper ‘Observation of charge-parity symmetry breaking in baryon decays’ originally released on 21 March 2025 has been published today in the journal Nature Original press release Yesterday, at the annual Rencontres de Moriond conference taking place in La Thuile, Italy, the LHCb collaboration at CERN reported a new milestone in our understanding of the subtle yet
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