Leptons

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Leptons

a class of elementary particles that do not have strong interaction—that is, they participate only in electromagnetic, weak, and gravitational interactions. The electron, muon, and electron and muon neutrinos and their corresponding antiparticles are classified as leptons. All leptons have a spin of ½ (that is, they are fermions). The name “lepton” (from Greek leptos, “small,” “light”) is associated with the fact that their mass is less than that of any other particle except the photon.

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No references found			Although some theorists had suggested that heavy leptons exist, no one was certain that any would be found (SN: 9/12/92, p. Lepton physics work attracts Nobel honors by Peterson, Ivars / Science News			leptocephalous larva leptocephaly leptocercal Leptochoeridae Leptodactylidae leptodactylous Leptodactylus Leptodiridae leptogeosyncline leptokurtic distribution Leptolepidae Leptolepiformes Leptolida Leptomedusae Leptomedusans leptomeninges leptomeningitis Leptomitales Leptomonas lepton Lepton Charge lepton conservation lepton era lepton number leptonic decay Leptons leptophos leptophyll Leptopodidae Leptopodoidea Leptoptilus leptoquark leptoquark boson leptorrhine Leptosomatidae Leptospira Leptospiroses leptospirosis leptospirosis icterohemorrhagia leptosporangium leptostaphyline Leptostraca Leptostromataceae leptotene Leptothrix Leptotrichia Leptotyphlopidae Lepus Leq LER Leray, Jean			leptomeningitis leptomeningitis leptomeningopathy leptomeninx Leptomitales leptomonad Leptomonas Leptomonas lepton lepton lepton lepton Lepton Charge lepton conservation lepton era Lepton family number Lepton family number Lepton Flavour Number Violating Lepton number Lepton number lepton numbers lepton numbers Lepton-Number Violating Leptonema leptonic leptonic leptonic leptonic leptonic decay Leptonic mixing matrix Leptons leptopellic leptophonia leptophos leptophyll leptophyllous Leptopodidae Leptopodoidea Leptopsylla segnis Leptopteris Leptopteris superba Leptoptilos Leptoptilos crumeniferus Leptoptilus Leptoptilus Leptoptilus crumeniferus Leptoptilus dubius Leptopus decaisnei Leptoquark leptoquark boson leptorhine Leptorhynchus pectoralis leptorrhine leptorrhine leptorrhinian leptorrhinic leptosomatic leptosomatic

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