It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons (two up quarks, one down quark) of atomic nuclei. It is...

observable matter is composed of up quarks, down quarks and electrons. Owing to a phenomenon known as color confinement, quarks are never found in isolation;...

The strange quark or s quark (from its symbol, s) is the third lightest of all quarks, a type of elementary particle. Strange quarks are found in subatomic...

bottom quark, beauty quark, or b quark, is an elementary particle of the third generation. It is a heavy quark with a charge of −⁠1/3⁠ e. All quarks are...

The proton is made of one down quark with two up quarks, and the neutron is made up of two down quarks with one up quark. Because they are found in every...

The top quark, sometimes also referred to as the truth quark, (symbol: t) is the most massive of all observed elementary particles. It derives its mass...

In particle physics, the quark model is a classification scheme for hadrons in terms of their valence quarks—the quarks and antiquarks that give rise to...

The charm quark, charmed quark, or c quark is an elementary particle found in composite subatomic particles called hadrons such as the J/psi meson and...

up quark has T3 = ⁠++1/2⁠ and the down quark has T3 = ⁠−+1/2⁠. A quark never decays through the weak interaction into a quark of the same T3: Quarks with...

Quark or quarg is a type of fresh dairy product made from milk. The milk is soured, usually by adding lactic acid bacteria cultures, and strained once...

Look up quark in Wiktionary, the free dictionary. A quark is an elementary particle. Quark may also refer to: "Quark", a nonce word in James Joyce's Finnegans...

three positively charged quarks are called "up-type quarks" while the three negatively charged quarks are called "down-type quarks". Leptons do not interact...

up quark and two down quarks. Quarks are held together by the strong force, or equivalently, by gluons, which mediate the strong force at the quark level...

A quark star is a hypothetical type of compact, exotic star, where extremely high core temperature and pressure have forced nuclear particles to form...

helium-4 (in mass). Neutrons are made up of one up and two down quarks, while protons are made of two up and one down quark. Since the other common elementary...

weapon UP (complexity) Up (game theory) Up quark, in physics Upper Paleolithic, a stone age Volkswagen Up, an automobile Up, a cocktail term Up, a railroad...

quarks (up, charm, and top quarks) are called up-type quarks and have T3 = ⁠++1/2⁠ ; the negatively charged quarks (down, strange, and bottom quarks)...

quark model, the properties of hadrons are primarily determined by their so-called valence quarks. For example, a proton is composed of two up quarks...

first-generation quarks. In the quark model, an up quark and an anti-down quark make up a π+ , whereas a down quark and an anti-up quark make up the π− , and...

valence quarks, and together with neutrons are now classified as hadrons. Protons are composed of two up quarks of charge +⁠2/3⁠e each, and one down quark of...

down quark shown in bold ( d ) is nominally the one emitting the boson ( W− ) and thereby changing into an up quark ( u ), also in bold. The u d quark pair...

Current quarks (also called naked quarks or bare quarks) are a description of valence quarks as the cores of the quark particles that are the invariable...

particle physics, isospin (I) is a quantum number related to the up- and down quark content of the particle. Isospin is also known as isobaric spin or...

the quark level, W− emission turns a down quark into an up quark, turning a neutron (one up quark and two down quarks) into a proton (two up quarks and...

a neutron, composed of two down quarks and an up quark, decays to a proton composed of a down quark and two up quarks. Electron capture is sometimes included...

less. A proton is made of two up quarks and one down quark, while the neutron is made of two down quarks and one up quark. These commonly bind together...

indication of its quark substructure and internal charge distribution. In the quark model for hadrons, the neutron is composed of one up quark (charge +2/3 e)...

replace quarks. For example, a proton is made of two up quarks and one down quark; and its corresponding antiparticle, the antiproton, is made of two up antiquarks...

concepts (quarks had not yet been proposed), the Cabibbo angle is related to the relative probability that down and strange quarks decay into up quarks ( |Vud|2...

composite of an up quark and two down quarks ( u d d ). It is one of the down quarks that interacts in beta decay, turning into an up quark to form a proton...