Wiktionary英語版

出典：Wiktionary

lambda baryon

出典:『Wiktionary』 (2025/09/21 04:30 UTC 版)

名詞

lambda baryon (plural lambda baryons)

  1. (physics) Any of three particles, having no electric charge and an isotopic spin of 1, composed of an up quark, down quark and either a strange quark, a charm quark or a bottom quark.

同意語

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ウィキペディア英語版

出典：Wikipedia

Lambda baryon

出典:『Wikipedia』 (2011/06/27 17:52 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

In particle physics, lambda (Λ) baryons are baryons containing an up quark, a down quark, and a third quark, either a strange quark (Λ0
), a charm quark (Λ+
c) or a bottom quark (Λ0
b). The first Lambda particle discovered (Λ0
) was discovered in 1947 during a study of cosmic ray interactions. Though the particle was expected to live for ~10−23 seconds, it actually survived for ~10−10 seconds. The property which 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 (because non-weak methods of particle decay must preserve the strangeness of the decaying baryon).

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