bottom quark


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Related to bottom quark: charm quark, top quark, up quark, strange quark

bottom quark

n. Abbr. b
The flavor of quark that has a charge of - 1/3 , has a mass about 8,220 times that of an electron, and belongs to the third generation of elementary fermions. Also called beauty quark.

bot′tom quark`


n.
the quark having electric charge −? times the electron's charge and greater mass than the up, down, charmed, and strange quarks.
[1975–80]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.bottom quark - a quark with a charge of -1/3 and a mass about 10,000 times that of an electron
quark - (physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3; "quarks have not been observed directly but theoretical predictions based on their existence have been confirmed experimentally"
References in periodicals archive ?
bound states of bottom quark pairs,in heavy-ion collisions.
The study of Kobayashi and Maskawa was substantiated by the discoveries of the charm quark in 1974 (8) and the bottom quark in 1977.
Each chromatic pentad also contains three matrices corresponding to three coordinates and two mass matrices--one for top quark and another--for bottom quark.
Leon Lederman and colleagues report evidence of a new quark, the bottom quark, in experiments at Fermilab (8/13/77, p.
He asserted that the particle comprises a bottom quark and a bottom anti-quark.
The pair of quarks expected from the Higgs--a bottom quark and its antimatter partner- would in turn decay into jets of still other particles visible to the Tevatron.
b]) contains a strange quark, an up quark and a bottom quark.
After starting to work on 30 March, one of LHC's four large detectors detected evidence of a beauty quark - also, less poetically, known as a bottom quark - on 5 April.
Because the two accelerators hunt for the Higgs in different ways--the Tevatron would detect the proposed particle's most common decay products, a bottom quark and its antiparticle, while the Large Hadron Collider would record a rarer decay mode that produces two photons--the searches are not only competitive but complementary.
The standard model of particle physics predicts the existence and mass of this particle, which is a baryon, like protons and neutrons, and is made up of two strange quarks and a bottom quark.
Proton's cousin Physicists discover omega-b-minus, a particle made of two strange quarks and a bottom quark (SN: 9/27/08, p.