: an unstable lepton that is common in the cosmic radiation near the earth's surface, has a mass about 207 times the mass of the electron, and exists in negative and positive forms
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The only viable explanation is that an even higher-energy particle — a more stable one — must have struck the upper atmosphere of the Earth and produced a particle shower, where those decaying particles led to the presence of these muons.
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Big Think, 30 Jan. 2026
The facility will produce a lot of tau particles and charm quarks, partly to study whether taus ever shape-shift into muons or electrons.
—Quanta Magazine, 26 Jan. 2026
In 2017, while a graduate student at MIT, Axani developed CosmicWatch with the intention of building a small, low-power muon detector.
—Chris Young, Interesting Engineering, 8 Jan. 2026
Cosmic rays batter Earth's atmosphere constantly, interacting with molecules of air and producing showers of exotic particles such as muons, high energy neutrons and positrons.
—Tereza Pultarova, Space.com, 3 Dec. 2025
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Big Think, 30 Jan. 2026
The facility will produce a lot of tau particles and charm quarks, partly to study whether taus ever shape-shift into muons or electrons.
—Quanta Magazine, 26 Jan. 2026
In 2017, while a graduate student at MIT, Axani developed CosmicWatch with the intention of building a small, low-power muon detector.
—Chris Young, Interesting Engineering, 8 Jan. 2026
Cosmic rays batter Earth's atmosphere constantly, interacting with molecules of air and producing showers of exotic particles such as muons, high energy neutrons and positrons.
—Tereza Pultarova, Space.com, 3 Dec. 2025
See All Example Sentences for muon
Cite this Entry
“Muon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muon. Accessed 12 Feb. 2026.
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