lambda hyperon

lambda hyperon

[′lam·də ′hī·pə‚rän]

(particle physics)

A quasi-stable baryon, forming an isotopic singlet, having zero charge and hypercharge, a spin of ½, positive parity and mass of approximately 1115.5 megaelectronvolts. Designated Λ. Also known as lambda particle.

Any baryon resonance having zero hypercharge and total isotopic spin; designated Λ_JP (m), where m is the mass of the baryon in megaelectronvolts, and J and P are its spin and parity (if known).

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.