Gourt > Science > Physics > Particle > Neutrino (2)
The neutrino is an elementary particle. It has half-integer spin () and is therefore a fermion. All neutrinos observed to date have left-handed chirality. Although they had been considered massless for many years, recent experiments (see Super-Kamiokande, Sudbury Neutrino Observatory, KamLAND and MINOS) have shown their mass to be non-zero. Because it is an electrically neutral lepton, the neutrino interacts neither by way of the strong nor the electromagnetic force, but only through the weak force and gravity.
Because the cross section in weak nuclear interactions is very small, neutrinos can pass through matter almost unhindered. For typical neutrinos produced in the sun (with energies of a few MeV), it would take approximately one light year (~1016m) of lead to block half of them. Detection of neutrinos is therefore challenging, requiring large detection volumes or high intensity artificial neutrino beams.
Types of neutrinos
| Fermion | Symbol | Mass |
|---|---|---|
| Generation 1 (electron) | ||
| Electron neutrino | < 2.2 eV | |
| Electron antineutrino | < 2.2 eV | |
| Generation 2 (muon) | ||
| Muon neutrino | < 170 keV | |
| Muon antineutrino | < 170 keV | |
| Generation 3 (tau) | ||
| Tau neutrino | < 15.5 MeV | |
| Tau antineutrino | < 15.5 MeV | |
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Rolling and listening to Oxide & Neutrino bound for the reload... TOO HARD!
Clencha (CLENCHA) Mon, 21 Dec 2009 15:38:59 -0000
Rolling and listening to Oxide & Neutrino bound for the reload... TOO HARD!
I know little about the black matter detector but it's probably a lot like the neutrino detector in Sudbury Ont. CA which uses heavy water
GodlessPeace (GodlessPeace) Mon, 21 Dec 2009 13:38:20 -0000
I know little about the black matter detector but it's probably a lot like the neutrino detector in Sudbury Ont. CA which uses heavy water
Neutrino 1.86 - Audio player with many effects/features (was AudioCodex). http://tinyurl.com/ydnq6w7
MacUpdate (MacUpdate) Mon, 21 Dec 2009 09:20:36 -0000
Neutrino 1.86 - Audio player with many effects/features (was AudioCodex). http://tinyurl.com/ydnq6w7
Neutrino & harvey flexfm.co.uk or 99.7fm from 6pm tonight
McNeutrino (Neutrino) Sun, 20 Dec 2009 15:51:28 -0000
Neutrino & harvey flexfm.co.uk or 99.7fm from 6pm tonight
HARVEY @ NEUTRINO LEGENDARY SET 6PM TODAY FLEX FM 99.7
Harveyofficial (Harvey) Sun, 20 Dec 2009 15:37:52 -0000
HARVEY @ NEUTRINO LEGENDARY SET 6PM TODAY FLEX FM 99.7
www.stiinta.info: Podcast 5 minute - Neutrino, particula fantoma - partea I
stiintainfo (stiinta.info) Sun, 20 Dec 2009 13:10:11 -0000
www.stiinta.info: Podcast 5 minute - Neutrino, particula fantoma - partea I
Costas Andreopoulos - Personal home page, describes his involvement in MINOS and DONUT experiments.
Discovery of Neutrino Mass - Super-Kamiokande discovered neutrino oscillations which imply non-zero mass.
404
Fantomatic Neutrino - Introductory article about neutrinos.
Frederick Reines - Discoverer of the neutrino.
History of the Neutrino - Includes explanation of neutrino physics and research.
Meta Description: [ History and some introduction to neutrino particle ]
Hitoshi Murayama's Neutrino Page - Combined oscillation parameter plots, implications of neutrino mass.
Jobs - Job positions related to neutrino experiments.
Long Baseline Neutrino Oscillation Newsletters - New experiment planning, approval, results, references; updated monthly.
500
Neutrino Factory Working Group - At CERN.
Meta Description: [ Home Page of the European Neutrino Group, ENG. ]
Neutrino Oscillations for Dummies - An explanation of neutrino oscillations using words and pictures rather than math.
Neutrino Physics - A set of lectures from the Trieste Summer School on the current state of neutrino physics.
500
Neutrino Unbound - Comprehensive lists of references on the theory of neutrino oscillations, four-neutrino mixing, sterile neutrinos and others.
Neutrinos Have Mass for Sure - A report on the years of collected experimental evidence that neutrinos have masses.
Meta Description: [ Jupiter Scientific's News Report on the Discovery that Neutrinos Have Masses ]
Nobel Prize 1988 - Lederman, Schwartz and Steinberger for the discovery of the muon neutrino and for the neutrino beam method.
Nobel Prize 1995 - For the detection of the neutrino by Professor Frederick Reines; description of the discovery and background material.
500
SNEWS - SuperNova Early Warning System; network utilizing existing detectors in coincidence to detect neutrino burst from supernova in order to provide alert to astronomers.
Solar Neutrino Problem - Article about neutrino oscillations explaining deficit of neutrinos arriving from the sun.
Solar Neutrinos - Page by John Bahcall, expert in calculating neutrino fluxes and spectra with Standard Solar Model.
Meta Description: [ john bahcall home page: ]
Tau Neutrino Observation - Direct evidence by DONUT experiment.
Meta Description: [ A portion of Number 495 ]
The First Detection of The Neutrino - A short article describing the discovery.
The Neutrino Oscillation Industry - Categorized links to experiments and theory, meetings, jobs, newsletter, and general neutrino links.
Meta Description: [ A complete list of experiments studying
neutrino oscillations ]
404
The Solar Neutrino Problem - From USENET Physics FAQ.
The Ultimate Neutrino Page - Neutrino physics information and many links.
Universal Particle - Popular article about new developments in neutrino physics, Dallas Morning News.
404
What is a Neutrino? - From Scientific American: Ask the Experts: Physics.
Meta Description: [ Science questions and science expert answers in chemistry, physics, astronomy, mathematics, computers, environment, geology, medicine ]
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