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Encyclopedia > Electron antineutrino

An antineutrino is the antimatter equivalent particle of the neutrino. It is produced in nuclear beta decay as a balance to the electron emitted by the nucleus. Neutrinos and antineutrinos only interact with other matter particles via the weak nuclear force, and consequently their properties do not differ greatly.


There is a hypothesis that the neutrino and the antineutrino are actually the same particle. This would mean, that the neutrino field is not a Dirac spinor, as in the standard model, but a Majorana spinor. For experimental evidence on this attempts are made to find neutrinoless double beta decay.


External links

  • Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990–2003 (http://www.mpi-hd.mpg.de/non_acc/POSITIVE-EVID/NEW-2004/PL586-2004.pdf)

Particles in Physics - Elementary particles - Leptons

Edit (http://en.wikipedia.org/w/wiki.phtml?title=Template:Leptons&action=edit)
Particles: Electron | Muon | Tauon | Electron neutrino | Muon neutrino | Tau neutrino
Antiparticles : Positron | Antimuon | Antitauon | Electron antineutrino | Muon antineutrino | Tau antineutrino

  Results from FactBites:
 
The Weak Force: Identity or Number Charge (2686 words)
(a tau decays to a muon, tau neutrino, and muon antineutrino)
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Neutrino - Wikipedia, the free encyclopedia (3144 words)
This effect was first noticed due to the number of electron neutrinos detected from the sun's core failing to match the expected numbers, a discrepancy dubbed the "solar neutrino problem".
Despite their massive nature, it is still possible that the neutrino and antineutrino are in fact the same particle, a hypothesis first proposed by the Italian physicist Ettore Majorana.
An electron in the detector produces an electromagnetic shower which can be distinguished from hadronic showers if the granularity of the active detector is small compared to the physical extent of the shower.
  More results at FactBites »


 
 

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