Xi-baryon meaning

zī, sī, ksē
Either of two baryons that contain two strange quarks and have a neutral or negative charge, masses of 2,573 and 2,586 times that of the electron, and mean lifetimes of 2.9 × 10−10 and 1.6 × 10−10 second, respectively.
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Either of two subatomic particles in the baryon family, one neutral and one negatively charged, with masses of 2,572 and 2,585 times that of the electron and average lifetimes of 2.9 × 10&spminus;10 and 1.6 × 10&spminus;10 seconds.
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(physics) A subatomic hadron particle, denoted by Ξ, comprising three quarks: one up or down quark, and two heavier quarks.
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Origin of xi-baryon

  • Named after the Greek letter.

    From Wiktionary