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1.1.2 Leptons. 1.2 Bosons. 2 Composite particles. ... Σ, Ξ, and Ω particles, which contain one or more strange quarks, are short-lived and heavier than nucleons.
All mesons are unstable, with the longest-lived lasting for only a few tenths of a nanosecond. Heavier mesons decay to lighter mesons and ultimately to stable electrons , neutrinos and photons . Outside the nucleus, mesons appear in nature only as short-lived products of very high-energy collisions between particles made of quarks, such as ...
In particle physics, a lepton is an elementary particle of half-integer spin (spin 1 / 2 ) that does not undergo strong interactions. [1] Two main classes of leptons exist: charged leptons (also known as the electron-like leptons or muons), including the electron, muon, and tauon, and neutral leptons, better known as neutrinos.
This page lists radioactive nuclides by their half-life.
Therefore this bound muon-electron pair can be treated to a first approximation as a short-lived "atom" that behaves chemically like the isotopes of hydrogen (protium, deuterium and tritium). Both positive and negative muons can be part of a short-lived pi-mu atom consisting of a muon and an oppositely charged pion.
The tau (τ), also called the tau lepton, tau particle or tauon, is an elementary particle similar to the electron, with negative electric charge and a spin of 1 / 2 .Like the electron, the muon, and the three neutrinos, the tau is a lepton, and like all elementary particles with half-integer spin, the tau has a corresponding antiparticle of opposite charge but equal mass and spin.
The long-lived neutral kaon is called the K L ("K-long"), decays primarily into three pions, and has a mean lifetime of 5.18 × 10 −8 s. The short-lived neutral kaon is called the K S ("K-short"), decays primarily into two pions, and has a mean lifetime 8.958 × 10 −11 s. Quark structure of the antikaon (K −). (See discussion of neutral ...
The abbreviation is not always a short form of the word used in the clue. For example: "Knight" for N (the symbol used in chess notation) Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE.