Definitions for lambda particle
This page provides all possible meanings and translations of the word lambda particle
lambda particle, lambda hyperon(noun)
an electrically neutral baryon with isotopic spin 1
The Lambda baryons are a family of subatomic hadron particles that have the symbols Λ0, Λ+ c, Λ0 b, and Λ+ t and have +1 elementary charge or are neutral. They are baryons containing three different quarks: one up, one down, and one third quark, which can be either a strange, a charm, a bottom, or a top quark. The top Lambda is not expected to be observed as the Standard Model predicts the mean lifetime of top quarks to be roughly 5×10^−25 s. This is about 20 times shorter than the timescale for strong interactions, and therefore it does not form hadrons. The Lambda baryon Λ0 was first discovered in October 1950, by V D Hopper and S Biswas of the University of Melbourne, as a neutral V particle with a proton as a decay product, thus correctly distinguishing it as a baryon rather than a meson; they were produced by cosmic rays and detected in photographic emulsions flown in a balloon at 70,000 ft. Though the particle was expected to live for ~10−23 s, it actually survived for ~10−10 s. The property that caused it to live so long was dubbed strangeness and led to the discovery of the strange quark. Furthermore, these discoveries led to a principle known as the conservation of strangeness, wherein lightweight particles do not decay as quickly if they exhibit strangeness.
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