Strange quark


Strange quark

Infobox Particle
bgcolour =
name = Strange Quark


caption =
num_types =
composition = Elementary particle
family = Fermion
group = Quark
generation = Second
interaction =
particle =
antiparticle =
theorized =
discovered =
symbol =
mass = 80 - 130 MeV/c2
decay_time =
decay_particle =
electric_charge = −1/3 e
color_charge =
spin = ½
num_spin_states =

The strange quark is a second-generation quark with a charge of −(1/3)"e" and a strangeness of −1. It is the third-lightest quark after the up and down quarks, with a mass of somewhere between 80 and 130 MeV. The first strange particle (particle containing a strange-valence quark) was discovered in 1947, with the identification of the kaon, but the strange quark itself was not identified until Gell-Mann and Zweig developed the quark model in 1964.

Hadrons containing strange-valence quarks

Hadrons containing strange-valence quarks include the following:
*Kaons are mesons containing a strange quark (or its antiparticle) and an up or down quark.
*The SubatomicParticle|Eta and SubatomicParticle|Eta prime flavorless mesons are linear combinations of several quark-antiquark pairs, including the strange-antistrange.
*The SubatomicParticle|Phi meson flavorless meson is pure strange-antistrange.
*Strange baryons are known as hyperons: the SubatomicParticle|Sigmas and SubatomicParticle|Lambdas have one strange quark, the SubatomicParticle|Xis two, and the SubatomicParticle|Omegas three.

ee also

* Strange matter
* Strange star
* Strangelet


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Look at other dictionaries:

  • strange quark — strange′ quark′ n. phs the quark having an electric charge −? times the electron s charge, strangeness quantum number of −1, and more mass than the up and down quarks • Etymology: 1970–75 …   From formal English to slang

  • strange quark — n. Particle Physics a type of quark with a mass of c. 0.1 to 0.3 GeV/c2, a negative charge that is 1/ 3 the charge of an electron, zero charm, and −1 strangeness: see FLAVOR (sense 5) …   English World dictionary

  • Strange-Quark — Ein Proton, bestehend aus zwei up Quarks und einem down Quark Quarks (kwɔrk, kwɑːk oder kwɑːrk) sind die elementaren Bestandteile (Elementarteilchen), aus denen man sich …   Deutsch Wikipedia

  • strange quark — noun a quark with an electric charge of 1/3 and a mass 988 times that of an electron and a strangeness of 1 • Syn: ↑squark • Hypernyms: ↑quark * * * Physics. a quark having electric charge 1/3 times the elementary charge and strangeness 1; it is… …   Useful english dictionary

  • Strange-Quark — keistasis kvarkas statusas T sritis fizika atitikmenys: angl. squark; strange quark vok. Strange Quark, n rus. странный кварк, m pranc. quark étrange, m …   Fizikos terminų žodynas

  • strange quark — keistasis kvarkas statusas T sritis fizika atitikmenys: angl. squark; strange quark vok. Strange Quark, n rus. странный кварк, m pranc. quark étrange, m …   Fizikos terminų žodynas

  • strange quark — Physics. a quark having electric charge 1/3 times the elementary charge and strangeness 1; it is more massive than the up and down quarks. Also called s quark. [1970 75] * * * …   Universalium

  • strange quark — /ˈstreɪndʒ kwak/ (say straynj kwahk) noun a quark with a charge of 1/3 e. Symbol: s Also, s quark …   Australian English dictionary

  • strange quark — noun A quark having a fractional electric charge of 1/3 and a mass about 80 to 130 MeV. Symbol: s …   Wiktionary

  • Anti-Strange-Quark — Ein Proton, bestehend aus zwei up Quarks und einem down Quark Quarks (kwɔrk, kwɑːk oder kwɑːrk) sind die elementaren Bestandteile (Elementarteilchen), aus denen man sich …   Deutsch Wikipedia