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strange B meson

American  

noun

  1. Physics. a meson with a neutral electrical charge, a mass of 10,507 times that of the electron, and a mean lifetime of approximately 1.6 × 10-12 seconds.

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Researchers also observed the rare decay of a particle known as the strange B meson, the subject of a 30-year quest.

From The Wall Street Journal

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

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