xi particle

American

noun

Physics.

any of a family of baryons having strangeness −2 and isotopic spin ½. Ξ

Etymology

Origin of xi particle

First recorded in 1960–65

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xi particle

It should have a life span of one ten-billionth of a second after it is formed, and then decay into a xi particle and a pi-meson.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023