mu-meson
Noun: 1. An unstable elementary particle: A mu-meson is a subatomic particle belonging to the lepton family. It carries a negative electric charge and has an extremely short average lifetime before it decays into other particles.
The term "mu-meson" is a historical name that is now considered technically outdated in particle physics. In modern terminology, this particle is called a muon. It is used in scientific contexts to describe a fundamental component of matter. - Early cosmic ray experiments provided evidence for the existence of the mu-meson. - The mu-meson, now known as the muon, was discovered in 1936.
- The name "mu-meson" is a relic from when the particle was mistakenly classified as a type of meson. Its properties were later understood to be fundamentally different, leading to its reclassification as a lepton, like the electron.
- In contemporary academic and research papers, the term "muon" is exclusively used. "Mu-meson" may appear in historical texts or in discussions about the history of particle physics.
- Muon (n): The modern and correct term for the particle historically called the mu-meson.
- Muons are created in the upper atmosphere when cosmic rays collide with air molecules.
- Antimuon (n): The antiparticle of the muon, carrying a positive charge.
- Lepton (n): The family of elementary particles to which the muon (mu-meson) belongs. Other leptons include the electron and the tau particle.
- Muon: The direct and preferred synonym.
- Negative muon: A more specific term emphasizing its charge.
The definition of "mu-meson" is precise and refers to a single, specific particle. Its key characteristics are: 1. Elementary particle: It is not made up of smaller particles. 2. Negative charge: It has a charge equal to that of an electron. 3. Short half-life: It spontaneously decays after an average of about 2 microseconds (2 millionths of a second) into an electron and two neutrinos.
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an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino
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