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B particle

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noun Physics.
  1. B meson.

Origin of B particle

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
b particle in Science

B particle

  1. Either of two subatomic particles in the meson family, one neutral and one positively charged, both of which have masses 10,331 times that of an electron and average lifetimes of 1.6 X 10-12 seconds. B particles contain bottom quarks. See Table at subatomic particle.
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