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UP QUARK [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2025-04-23

English

Subject field(s)
  • Atomic Physics
  • Relativity (Physics)
DEF

A quark with an electric charge of +2/3, baryon number of 1/3, and 0 strangeness and charm.

CONT

The lightest quarks are the "up" quark, the "down" quark, and the strange quark...

French

Domaine(s)
  • Physique atomique
  • Relativité (Physique)
CONT

Il faut évidemment supposer que A=1/3 pour chacun des quarks u, d, s. D'autre part, les charges doivent aussi être fractionnaires.

Spanish

Campo(s) temático(s)
  • Física atómica
  • Relatividad (Física)
CONT

El electrón es el leptón cargado más ligero y se asocia, por tanto, con los quarks más ligeros, el quark u (o quark arriba) y el quark d (o quark abajo).

OBS

cuark arriba: La Fundación del Español Urgente (Fundéu BBVA), con el asesoramiento de la Real Academia Española, indica que aunque puede haber algunas variaciones, los seis "cuarks" postulados y detectados por los físicos reciben los nombres de "arriba", "abajo", "encanto", "extraño", "cima" y "fondo", que permanecen invariables en aposición: los "cuarks arriba". Las formas españolas, ampliamente usadas, son preferibles a las inglesas "up", "down", "charm", "strange", "top" y "bottom".

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Record 2 2012-06-01

English

Subject field(s)
  • Atomic Physics
  • Nuclear Physics
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.

French

Domaine(s)
  • Physique atomique
  • Physique nucléaire
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.

Key term(s)
  • boson W-
  • W-

Spanish

Save record 2

Record 3 1995-06-13

English

Subject field(s)
  • Atomic Physics
CONT

... the Supercollider(SSC)... will be able to isolate the top quark and prove or disprove the theories in Preons. The SSC is a particle accelerator, a device used to study particles that are too small to be seen. The completed machine will be a 57-mile-long loop along which particles will move at almost light speed, smash into each other and break up into their components.

Key term(s)
  • super conducting supercollider

French

Domaine(s)
  • Physique atomique
DEF

Accélérateur de particules utilisant les propriétés de la supraconductivité.

CONT

La raison essentielle est évidemment la charge financière que représente la construction du futur accélérateur de particules, le supercollisionneur supraconducteur (SSC); cette nouvelle machine dont le gouvernement a décidé la mise en chantier devrait coûter environ 4,5 milliards de dollars (dollars 1988).

OBS

Projet américain d'accélérateur de particules désigné aussi sous le nom de "supercollisionneur" seulement.

Spanish

Save record 3

Record 4 1994-06-23

English

Subject field(s)
  • Atomic Physics
DEF

A term used to describe the quark types(up, down, strange, charmed, top, and bottom).

CONT

Each "flavor" of quark (i.e. u, d, or s) comes in three different colors (and the antiquarks in three different anti-colors).

French

Domaine(s)
  • Physique atomique
DEF

Nombre quantique conservé caractérisant les quarks et déterminant leur participation à l'interaction nucléaire faible.

CONT

les saveurs sont au nombre de six appelées «up», «down», «strange», «charm», «bottom», «top», et souvent désignées par les six initiales u, d, s, c, b, t.

Spanish

Save record 4

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