lambda-particle

lambda particle

noun Physics.
any of a family of neutral baryons with strangeness −1 or charm +1, and isotopic spin 0. The least massive member of the lambda family was the first strange particle to be discovered. Symbol: Λ
Also, lambda baryon.


Origin:
1950–55

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American Heritage
Science Dictionary
lambda particle  
An electrically neutral baryon having a mass 2,183 times that of the electron and a mean lifetime of approximately 2.6 × 10-10 seconds. See Table at subatomic particle.
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