neutrino

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Related to tau neutrino: tauon

neutrino

 [noo-tre´no]
a subatomic particle with an extremely small mass and no electric charge.

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.
References in periodicals archive ?
Reno, "Tau neutrino propagation and tau energy loss," Physical Review D - Particles, Fields, Gravitation and Cosmology, vol.
Fukuda et al., "Tau neutrinos favored over sterile neutrinos in atmospheric muon neutrino oscillations," Physical Review Letters, vol.
Therefore, the additional neutrino flow detected at Super-Kamiokande must be made of up muon and tau neutrinos. Moreover, they must have left the sun as electron neutrinos--the only kind it produces--and changed flavor along the way.
Sever, "Bounding the tau neutrino magnetic moment from the process [e.sup.+][e.sup.-] [right arrow] [gamma]v[bar.v]," Modern Physics Letters A, vol.
The scientists then filtered out unwanted particles to create what they presumed was an electrically neutral tau neutrino beam.
The most likely explanation, physicists say, is that muon neutrinos, the type produced on high, were changing into tau neutrinos, which the detector can't pick up.
One of their goals is to observe the tau neutrino and its interactions with matter.
According to the standard model of particle physics, neutrinos come in three varieties: the electron neutrino, muon neutrino, and tau neutrino, along with their antimatter counterparts.
Of the six quarks and six leptons postulated in the standard model of particle physics as the constituents of matter - ordinary and otherwise - only the top quark and the tau neutrino remain unobserved.
As Ralston told SCIENCE NEWS, the particles of physics can be divided into three separate generations, exemplified by the electron and the electron neutrino, the muon and the muon neutrino, and the tau particle and the tau neutrino. The generations seem to parallel each other without any connection between them or any reason for there being more than one.
In addition, if the muon and tau leptons are excited states of the electron derivable from (25), this would imply that the neutrino portion would also be specific to the muon and tau lepton excited states, thus leading to muon and tau neutrinos. A summary of the identification of quantum particles and their associated spacetime defects as shown in this paper is provided in Table 1.
We follow the choices of [26, 37] and have the electron neutrinos described by parameters [alpha] = 3.0, <[E.sub.[nu]]> = 11.5 MeV, and [T.sub.[nu]] = 2.88 MeV, and the muon and tau neutrinos by [alpha] = 3.0, <[E.sub.[nu]]> = 16.3 MeV, and [T.sub.[nu]] = 4.08 MeV.