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	e−	−1	+1	0	0	0.510998910  (±13)	Stable
	Positron	e+	+1	−1
	Muon	μ−	−1	0	+1	0	105.6583668  (±38)	2.197019×10−6 (±21)
	Antimuon	μ+	+1		−1
	Tau	τ−	−1	0	0	+1	1776.84  (±.17)	2.906×10−13 (±.010)
	Antitau	τ+	+1			−1
	Neutrino electronic	${\displaystyle \nu _{e}}$	0	+1	0	0	<0.0000022	Unknown
	Antineutrino electronic	${\displaystyle {\overline {\nu }}_{e}}$		−1
	Neutrino muonic	${\displaystyle \nu _{\mu }}$	0	0	+1	0	< 0.17	Unknown
	Antineutrino muonic	${\displaystyle {\overline {\nu }}_{\mu }}$			−1
	Neutrino tauic	${\displaystyle \nu _{\tau }}$	0	0	0	+1	< 15.5	Unknown
	Antineutrino tauic	${\displaystyle {\overline {\nu }}_{\tau }}$				−1

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

Notas e referentias

Notas

1. ↑ unitate de carga conventional

Referentias

1. ↑ ^{1,0 1,1} C. Amsler et al. (2008): Particle listings—Electron
2. ↑ ^{2,0 2,1} C. Amsler et al. (2008): Particle listings—Muon
3. ↑ ^{3,0 3,1} C. Amsler et al. (2008): Particle listings—Tau
4. ↑ ^{4,0 4,1 4,2 4,3 4,4} Particle listings — Neutrino properties (2008).
5. ↑ ^{5,0 5,1 5,2} Laboratory measurements and limits for neutrino properties. The Ultimate Neutrino Page (2005).