Le texto fonte de Lepton

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

== Lista ==

:{| class="wikitable" style="text-align:center"
|+Properties of leptons
|-
!colspan=9|
|-
!rowspan=2| [[Spin|Spin<br />{{mvar|J}}]]
!rowspan=2| Nomine del <br />particula o antiparticula
!rowspan=2| Symbolo
!rowspan=2| [[Carga electric|Carga<br />{{mvar|Q}}]] <small>([[elementary charge|''e'']])<!--{{efn|name=conventional charge unit}}</small>--><ref group=note>unitate de carga conventional</ref>
!colspan=3| Lepton flavor number
!rowspan=2| Masse<br /><small>([[Electron-volt|MeV]]/''[[Velocitate de lumine|c]]''<sup>2</sup>)</small>
!rowspan=2| Vita duration<br /><small>([[Secunda|s]])</small>
|-
! {{mvar|L}}{{sub|e }}
! {{mvar|L}}{{sub|μ }}
! {{mvar|L}}{{sub|τ }}
<!-- ! Common decay -->
|-
!colspan=9|
|-
|rowspan=13| '''1⁄2'''
|style="text-align:left"| [[Electron]]<ref name="Electron">C. Amsler et al. (2008): [http://pdg.lbl.gov/2008/listings/s003.pdf Particle listings—Electron]</ref>
| <!--{{math| {{SubatomicParticle|link=yes|Electron}} }}-->e<sup>−</sup>
| −1
| +1
|rowspan=2| 0
|rowspan=2| 0
|rowspan=2 style="text-align:right"| 0.510998910&nbsp;<br />(±13)
|rowspan=2| Stable
<!-- |rowspan=2| Stable -->
|-
|style="text-align:left"| [[Positron]]<ref name="Electron" />
| <!--{{math| {{SubatomicParticle|link=yes|Positron}} }}-->e<sup>+</sup>
| +1
| −1
|-
<!-- |rowspan=2| {{frac| 1 |2}} -->
|style="text-align:left"| [[Muon]]<ref name="Muon" />
| <!--{{math| {{SubatomicParticle|link=yes|Muon}} }}-->μ<sup>−</sup>
| −1
|rowspan=2| 0
| +1
|rowspan=2| 0
|rowspan=2 style="text-align:right"| 105.6583668&nbsp;<br />(±38)
|rowspan=2 style="text-align:right"| 2.197019×10<sup>−6</sup><br />(±21)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!-- |rowspan=2| {{math|{{SubatomicParticle|link=yes|electron-}} + {{SubatomicParticle|link=yes|electron antineutrino}} + {{SubatomicParticle|link=yes|muon neutrino}} }} -->
|-
<!-- |rowspan=2| {{frac|1|2}} -->
|style="text-align:left"|[[Antimuon]]<ref name="Muon">C. Amsler et al. (2008): [http://pdg.lbl.gov/2008/listings/s004.pdf Particle listings—Muon]</ref>
| <!--{{math| {{SubatomicParticle|link=yes|Antimuon}} }}-->μ<sup>+</sup>
| +1
| −1
|-
|style="text-align:left"| [[Tau (particle)|Tau]]<ref name="Tauon">C. Amsler et al. (2008): [http://pdg.lbl.gov/2008/listings/s035.pdf Particle listings—Tau]</ref>
| <!--{{math| {{SubatomicParticle|link=yes|Tau}} }}-->τ<sup>−</sup>
| −1
|rowspan=2| 0
|rowspan=2| 0
| +1
|rowspan=2 style="text-align:right"| 1776.84&nbsp;<br />(±.17)
|rowspan=2 style="text-align:right"| 2.906×10<sup>−13</sup><br />(±.010)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!-- |rowspan=2| See <small>[http://pdg.lbl.gov/2008/listings/s035.pdf ''τ decay modes'']</small> -->
|-
|style="text-align:left"| [[Antitau]]<ref name="Tauon" />
| <!--{{math| {{SubatomicParticle|link=yes|Antitau}} }}-->τ<sup>+</sup>
| +1
| −1
|-
!colspan=8|
|-
<!-- |rowspan=2| {{frac|1|2}} -->
|style="text-align:left"| [[Neutrino electronic]]<ref name="Neutrino">{{cite web |last1=Amsler |first1=C. |display-authors=etal |year=2008 |url=http://pdg.lbl.gov/2008/listings/s066.pdf |title=Particle listings — Neutrino properties}}</ref>
| <!--{{math| {{SubatomicParticle|link=yes|Electron neutrino}} }}--> <math>\nu_e</math>
|rowspan=2| 0
| +1
|rowspan=2| 0
|rowspan=2| 0
|rowspan=2 style="text-align:left"| <0.0000022<ref name=PeltoniemiSarkamo2005>{{cite web
 |first1=J. |last1=Peltoniemi |first2=J. |last2=Sarkamo |year=2005
 |url=http://cupp.oulu.fi/neutrino/nd-mass.html
 |title=Laboratory measurements and limits for neutrino properties
 |work=The Ultimate Neutrino Page
 |access-date=2008-11-07 |df=dmy-all}}
</ref>
|rowspan=2| Unknown
<!-- |rowspan=2| -->
|-
<!-- |rowspan=2| {{frac|1|2}} -->
|style="text-align:left"| [[Antineutrino electronic]]
| <!--{{math| {{SubatomicParticle|link=yes|Electron antineutrino}} }}--> <math>\overline{\nu}_e</math>
| −1
|-
|style="text-align:left"| [[Neutrino muonic]]<ref name="Neutrino" />
| <!--{{math| {{SubatomicParticle|link=yes|Muon neutrino}} }}--> <math>\nu_\mu</math>
|rowspan=2| 0
|rowspan=2| 0
| +1
|rowspan=2| 0
|rowspan=2 style="text-align:left"| < 0.17<ref name=PeltoniemiSarkamo2005 />
|rowspan=2| Unknown
<!-- |rowspan=2| -->
|-
|style="text-align:left"| [[Antineutrino muonic]]<ref name="Neutrino" />
| <!--{{math| {{SubatomicParticle|link=yes|Muon antineutrino}} }}--> <math>\overline{\nu}_\mu</math>
| −1
|-
<!-- |rowspan=2| {{frac|1|2}} -->
|style="text-align:left"| [[Neutrino tauic]]<ref name="Neutrino" />
| <!--{{math| {{SubatomicParticle|link=yes|Tau neutrino}} }}--><math>\nu_\tau</math>
|rowspan=2| 0
|rowspan=2| 0
|rowspan=2| 0
| +1
|rowspan=2 style="text-align:left"| < 15.5<ref name=PeltoniemiSarkamo2005 />
|rowspan=2| Unknown
<!-- |rowspan=2| -->
|-
|style="text-align:left"| [[Antineutrino tauic]]<ref name="Neutrino" />
| <!--{{math| {{SubatomicParticle|link=yes|Tau antineutrino}} }}--> <math>\overline{\nu}_\tau</math>
| −1
|-
!colspan=9|
|-
|}

Masses de neutrinos son non nulle a causa del phenomeno de [[oscillation de neutrinos]], ma illos son multe basse.
==Notas e referentias==
===Notas===
<!--{{notelist}}-->
<references group="note"/>

===Referentias===
<references/>

[[Categoria:Physica de particulas]]