neutrino

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Related to muon neutrino: electron neutrino, tau neutrino

neutrino

 [noo-tre´no]
a subatomic particle with an extremely small mass and no electric charge.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

neutrino

(nū-trē′nō)
In physics, a subatomic particle at rest, with no mass and no electric charge. These particles are constantly flowing through the universe and are not known to affect the matter through which they pass.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The beam consists of mostly muon neutrinos of energy around 2.5 GeV and expects a total exposure of 1.47 x [10.sup.21] POT running 3.5 years in neutrino mode and 3.5 years in antineutrino mode.
Since its discovery, two more "flavors" have been confirmed: tau neutrinos and muon neutrinos, which are associated with two unstable partner particles that, like electrons, belong to the lepton family of elementary particles.
In order to confront our present results with the recent MiniBooNE data, we assumed the following experimental quantities: the utilised muon neutrino flux, [[PHI].sub.v] ([E.sub.v]), is normalised to the protons on target (POT) with [N.sub.POT] denoting
An electron neutrino can oscillate into a tau neutrino if the disintegrated quark-antiquark pair ([u.sub.0] [[bar.u].sub.0]) is excited into ([u.sub.1] [[bar.u].sub.1]) (Figure 4a), a muon neutrino if the disintegrated quark-antiquark pair (u0u0) is changed in flavor into ([d.sub.0] [[bar.d].sub.0]) (Figure 4b), and a lambda neutrino if the disintegrated quark-antiquark pair ([u.sub.0] [[bar.u].sub.0]) is excited into ([u.sub.1] [[bar.u].sub.1]) and then changed in flavor into ([d.sub.1] [[bar.d].sub.1]) (Figure 4c).
To test the idea, researchers will first measure what fraction of muon neutrinos in the T2K beam turn into electron neutrinos.
The SNO team deduced this by comparing the rates of detections with those in a larger, normal-water experiment in Japan known as Super-Kamiokande (where evidence that muon neutrinos in cosmic-ray showers change flavor was announced three years ago; see S&T: September 1998, page 19).
The quantized view of equation (3) indicates that one of the intra-particle quantization components can be the source for the generational identity and a foundation for the generational exchange seen in the muon neutrino interaction [v.sub.[mu]] + N [right arrow] [P.sup.+] + [[mu].sup.-].
Periodic oscillations have been reported [24] in Pm142 which show an oscillating sinusoidal decay for electron capture (as contrasted to a conventionally established exponential decay) which the authors attribute to modulations caused by the oscillation of neutrinos between two different mass states (flavors), that of the electron neutrino emitted in the original decay, and that of the muon neutrino which is observed in decays of the muon (a particle 200 times more massive than the electron).
Casper et al., "Search for muon neutrino oscillations with the Irvine-Michigan-Brookhaven detector," Physical Review Letters, vol.
Andringa et al., "Evidence for muon neutrino oscillation in an accelerator-based experiment," Physical Review Letters, vol.
In 1998, researchers working at the SuperKamiokande detector in Japan demonstrated that neutrinos, which come in three varieties--electron neutrino, muon neutrino, and tau neutrino--can change into one another (SN: 6/13/98, p.
Alexopoulos, "Observation of Muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam," Physical Review Letters, vol.