Lepton

In physica de particulas, un lepton es un particula elementari (Fermion) de spin 1⁄2 non sensibile al interaction forte.

Lista

Properties of leptons

Spin J	Nomine del particula o antiparticula	Symbolo	Carga Q (e)[note 1]	Lepton flavor number			Masse (MeV/c2)	Vita duration (s)
				Le	Lμ	Lτ
1⁄2	Electron[1]	e−	−1	+1	0	0	0.510998910  (±13)	Stable
	Positron[1]	e+	+1	−1
	Muon[2]	μ−	−1	0	+1	0	105.6583668  (±38)	2.197019×10−6 (±21)
	Antimuon[2]	μ+	+1		−1
	Tau[3]	τ−	−1	0	0	+1	1776.84  (±.17)	2.906×10−13 (±.010)
	Antitau[3]	τ+	+1			−1
	Neutrino electronic[4]	${\displaystyle \nu _{e}}$	0	+1	0	0	<0.0000022[5]	Unknown
	Antineutrino electronic	${\displaystyle {\overline {\nu }}_{e}}$		−1
	Neutrino muonic[4]	${\displaystyle \nu _{\mu }}$	0	0	+1	0	< 0.17[5]	Unknown
	Antineutrino muonic[4]	${\displaystyle {\overline {\nu }}_{\mu }}$			−1
	Neutrino tauic[4]	${\displaystyle \nu _{\tau }}$	0	0	0	+1	< 15.5[5]	Unknown
	Antineutrino tauic[4]	${\displaystyle {\overline {\nu }}_{\tau }}$				−1

Masses de neutrinos son non nulle a causa del phenomeno de oscillation de neutrinos, ma illos son multe basse.