![]() These examples are programmatically compiled from various online sources to illustrate current usage of the word 'antimatter.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. antimatter / ( ntmt) / noun a form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons Collins English Dictionary - Complete & Unabridged 2012 Digital Edition William Collins Sons & Co. Clara Moskowitz, Scientific American, 14 Feb. 2022 And antimatter particles can carry antired, antigreen or antiblue charge. 2023 In this case, the antimatter was an antiproton. Michelle Frank, Scientific American, 13 Mar. 2023 In the lab, Wu and Shaknov used it to bombard a sheet of copper with deuterons, generating an unstable isotope, Cu 64, as a source of positrons-the antimatter. Antimatter Antimatter particles are identical to particles of matter, but with an opposite charge The AEgIS experimental zone at CERN, with the 1T magnet vessel open, displaying the. Zack Savitsky, Quanta Magazine, 10 Apr. Antimatter In particle physics, antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but have. 2023 See all Abstractions blog For one thing, our mere existence is proof that the Standard Model is incomplete, since according to the theory, the Big Bang should have produced equal parts matter and antimatter that would have annihilated each other. Antimatter came about as a solution to the fact that the equation describing a free particle in motion (the relativistic relation between energy, momentum and mass) has not only positive energy. 2021 The experiment-known as the Long Baseline Neutrino Facility (LBNF) and the Deep Underground Neutrino Experiment (DUNE)-aims to be the definitive test of neutrino properties and could help explain why the infant universe generated more matter than antimatter. Nathaniel Scharping, Discover Magazine, So the real thing about antimatter is that physicists don’t know very much about it. Chandrashekhar Joshi, Scientific American, 1 July 2021 The Alpha Magnetic Spectrometer has been collecting data from the International Space Station since 2011, but has yet to turn up evidence for antimatter. Recent Examples on the Web Though not as powerful as the LHC, the ILC would collide electrons with their antimatter counterparts, positrons-both fundamental particles that are expected to produce much cleaner data than the proton-proton collisions in the LHC. Antimatter definition: A form of matter that is identical to ordinary matter except that it is composed of antielectrons, antiprotons, and antineutrons.
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