antineutrino


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antineutrino

[′an·tē·nü¦trē·nō]
(particle physics)
The antiparticle to the neutrino; it has zero mass, spin ½, and positive helicity; there are two antineutrinos, one associated with electrons and one with muons.
References in periodicals archive ?
The net result is that the strong gluonic coupling can be assumed by the weak antineutrino coupling in terms of a neutral weak-interaction current.
One surefire way to catch some is to build a detector near a concentrated source of antineutrinos.
The researchers had assumed that neutrinos and antineutrinos would oscillate the same way.
When they show themselves, the elusive flickers signal arrivals of subatomic anti-matter particles called antineutrinos.
The new antineutrino findings parallel what's been seen with solar neutrinos, notes Giorgio Gratta of Stanford University, a KamLAND co-spokesman.
The standard model predicts a type of double-beta decay in which two neutrons simultaneously decay, while two electrons and two antineutrinos are emitted.
Two groups of researchers now say it may be feasible to measure directly the global abundance of these two isotopes by detecting electron antineutrinos produced when the atoms decay.
Pions decay into muons and muon neutrinos, and the muons, in turn, transform into positrons, electron neutrinos, and muon antineutrinos.
In such decay, one of the two neutrons in a tritium nucleus turns into a proton and sends off a particle-antiparticle pair -- an electron and an electron antineutrino.
The result is very exciting, because it essentially allows us to compare neutrino and antineutrino oscillations in the future and see how different they are and hopefully have an answer to the question, Why do we exist?
Using the Kamioka Liquid-scintillator Antineutrino Detector (KamLAND) located under a mountain in Japan, they analyzed geoneutrinos -emitted by decaying radioactive materials within the Earth.
In a recent study, Berkeley Lab scientists joined their KamLAND (Kamioka Liquid-scintillator Antineutrino Detector) colleagues to measure the radioactive sources of Earth's heat flow.