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eta meson

noun

, Physics.
  1. a neutral meson with strangeness 0 that is its own antiparticle. : η


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Word History and Origins

Origin of eta meson1

First recorded in 1960–65
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Example Sentences

The Brookhaven experiment involved a fast-decaying subatomic particle known as an eta meson, which breaks down into three lighter particles known as pions�one with no electrical charge.

About one-thirtieth of the times that a pi meson hit a deuterium nucleus, out came the eta meson, which decays into three pions.

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