TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

An antineutrino is the antiparticle partner of the neutrino, meaning that the antineutrino has the same mass but opposite "charge" of the neutrino. Although neutrinos are electromagnetically neutral(they have no electric charge and no magnetic moment), they may carry another kind of charge :lepton number. These are defining features that can distinguish a particle from an antiparticle(along with properties such as helicity).  2, record 1, English, - antineutrino

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Antiparticule du neutrino.  2, record 1, French, - antineutrino

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

There is now very substantial evidence for the existence of a new elementary particle called the tau... the properties of the [tau] are analogous to the properties of the electron(e) and muon... Therefore, the [tau] has been classified as a member of the lepton particle family... even though it is much heavier than the e or [the muon], having a mass of almost 1, 800 MeV [megaelectron volt]/[c-squared].  5, record 2, English, - tau

Record number: 2, Textual support number: 1 OBS

The word "tau" must be replaced by the corresponding Greek letter.  6, record 2, English, - tau

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Lepton lourd de masse voisine de 1850 MeV [mégaélectron volt].  2, record 2, French, - tau

Record number: 2, Textual support number: 1 CONT

[...] il semble de plus en plus certain, comme l'ont montré les résultats du SLAC et DESY présentés cet été [en 1977], qu'il existe un lepton lourd, le tau [...] de masse voisine de 1 850 MeV.  3, record 2, French, - tau

Record number: 2, Textual support number: 1 OBS

Le mot «tau» doit être remplacé par la lettre grecque correspondante.  4, record 2, French, - tau

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Partícula elemental masiva que pertenece a la tercera generación de leptones [...] junto al muón que pertenece a la segunda y al electrón de la primera.  1, record 2, Spanish, - part%C3%ADcula%20tau

Record number: 2, Textual support number: 1 CONT

Los miembros confirmados de la tercera familia son los dos leptones, el leptón tau y el neutrino tauónico, y el quark "fondo" o quark b.  4, record 2, Spanish, - part%C3%ADcula%20tau

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Weak interactions are responsible for the fact that all the more massive quarks and leptons decay to produce lighter quarks and leptons. When a particle decays, it disappears and in its place two or more particles appear. The sum of the masses of the produced particles is always less than the mass of the original particle. This is why stable matter around us contains only electrons and the lightest two quarks(up and down.) When a quark or lepton changes type(i. e. a muon changing to an electron) it is said to change flavor. All flavor changes are due to the weak interaction. The carrier particles of the weak intereactions are the W+, W-, and the Z bosons. The W's are electrically charged and the Z is neutral. A very interesting aspect of the Standard Model is that electromagnetic interactions and weak intereactions are combined into a unified interaction called electroweak.  1, record 3, English, - W%2D%20boson

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

L'une des conséquences de cette théorie (unifiant les forces magnétique et nucléaire faible) est que les médiateurs de l'interaction faible sont trois particules: les bosons intermédiaires W+, W- et Zo, qui jouent le même rôle que le photon dans l'interaction électromagnétique. Ces trois nouvelles particules devaient avoir une masse de l'ordre 100 GeV, soit cent fois celle du proton; elles ont été découvertes en 1983 grâce au synchrotron à protons de 400 GeV du CERN.  1, record 3, French, - boson%20interm%C3%A9diaire%20W%2D

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 OBS

muon : A lepton that appears to be almost identical to the electron, except for being unstable and having a mass about 207 times greater, and is the chief constituent of cosmic radiation at the surface of the earth.  2, record 4, English, - muon%20family

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

muon : Particule élémentaire à interactions faibles, de même charge que l'électron, positive ou négative.  2, record 4, French, - famille%20des%20muons

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Tau-type neutrons.  1, record 5, English, - tau%2Dtype

Record number: 5, Textual support number: 1 OBS

Elektronen Synchroton(DESY) located near Hamburg in Germany, in the period from 1975-1978 confirmed the discovery and the interpretation of the muon-electron production process as arising from a new heavy lepton, the tau. According to the pattern of the first two generations, such a particle will also have an associated neutrino type, which will be produced whenever it decays. All the observed tau processes are consistent with this interpretation.  2, record 5, English, - tau%2Dtype

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Relatif au tau.  1, record 5, French, - tauique

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Most preon models describe each quark and lepton as a combination of three preons. In the preon model of Salam and Pati a quark or lepton contains one of three "somons" that determines its generation, one of two "flavons" that determines its flavor and electrical charge, and one of four "chromons" that determines its color(or lack thereof) and modifies its electrical charge.... Chromons that are red, green, or blue have a charge of + 1/6, while the colorless chromon has a charge of-1/2.  1, record 6, English, - chromon

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

La couleur du système composite est fixée par des préons appelés chromons; il y a quatre chromons, un de couleur rouge, un jaune, un bleu et un sans couleur. (Pour la Science, no 68, juin 1983, p. 100).  1, record 6, French, - chromon

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

A charged or an uncharged elementary particle (as a positron or a neutrino) having a mass of the same order as, or smaller than, that of the electron.  2, record 7, English, - lepton

Record number: 7, Textual support number: 1 CONT

... the standard model holds that all matter is made of two kinds of particle: quarks (which constitute protons, neutrons and many other particles) and leptons (among which are electrons).  3, record 7, English, - lepton

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Un lepton est un fermion élémentaire insensible à l'interaction forte. Il existe six sortes de leptons : l'électron, le muon, le tau et les neutrinos électronique, muonique et tau.  2, record 7, French, - lepton

Record number: 7, Textual support number: 1 OBS

Le nom lepton vient du grec et signifie «léger». En effet, dans les années 1950, les trois catégories de particules connues étaient les leptons, les mésons et les baryons, correspondant aux mots grecs «léger», «moyen» et «lourd». Maintenant, on connaît un lepton plus lourd que certains baryons mais le nom est resté.  2, record 7, French, - lepton

Record 7,  Textual support,  Spanish

Record number: 7, Textual support number: 1 DEF

Cada una de las partículas elementales de masa, por lo general inferior a la de los mesones, que intervienen en los procesos de interacción débil.  1, record 7, Spanish, - lept%C3%B3n

Record number: 7, Textual support number: 1 CONT

Los neutrinos, electrones y muones son leptones.  1, record 7, Spanish, - lept%C3%B3n

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 OBS

W-bosons decay to produce either a quark and a differently charged antiquark or a charged lepton and a neutrino(or antineutrino).  2, record 8, English, - charged%20lepton

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 OBS

Le quark top et son antiparticule ne sont pas directement observables, car ils se désintègrent chacun en un quark b et en un boson W, lequel se désintègre à son tour en deux quarks, ou en lepton chargé et un neutrino.  2, record 8, French, - lepton%20charg%C3%A9

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Z bosons decay to produce either quark and its matching flavor antiquark or a lepton and its matching anti-lepton.  2, record 9, English, - anti%2Dlepton

Record number: 9, Textual support number: 1 OBS

The Electron is a lepton. The Electron anti-Neutrino is an anti-lepton. The Neutron and Proton are not leptons.  3, record 9, English, - anti%2Dlepton

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

À chaque lepton correspond un antilepton de même masse mais de charge opposée. Quand un lepton et son antilepton se rencontrent, ils s'annihilent pour libérer de l'énergie.  2, record 9, French, - antilepton

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 CONT

We give the general form of the angular distribution of lepton pairs produced in hadron collisions, where each dilepton is assumed to come from the decay of a virtual photon.  1, record 11, English, - dilepton

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Système composé de deux leptons.  1, record 11, French, - dilepton

Record number: 11, Textual support number: 1 CONT

Cette floraison de dileptons n'était pas, malgré tout, une preuve concluante de la désintégration d'une particule charmée de masse 2 GEV environ.  1, record 11, French, - dilepton

Record 11,  Textual support,  Spanish