lambda particle

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Related to lambda particle: strange particles, Xi particle
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Noun1.lambda particle - an electrically neutral baryon with isotopic spin 1
hyperon - any baryon that is not a nucleon; unstable particle with mass greater than a neutron
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But after analyzing about 26,000 decays of the bottom lambda particle, the team found that roughly 8 percent produced a previously unknown particle nearly 4.7 times as massive as a proton; another 4 percent generated a slightly heftier particle.
If the excited up quark is not degenerated but directly annihilate with the excited antidown quark, a lambda particle [[lambda].sup.+] is produced (as shown in Figure 3).
* By producing unprecedented numbers of atomic nuclei harboring pairs of exotic lambda particles, physicists verified nature's preference for combining in twos and threes the fundamental particles that they call quarks.