bottom quark


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

bottom quark

[′bäd·əm ‚kwärk]
(particle physics)
A quark with a mass of about 4.7 GeV, electric charge of -⅓, zero isotopic spin, strangeness and charm, and a new quantum number associated with it. Also known as b quark; beauty quark. Symbolized b.
References in periodicals archive ?
The weightiest parts of the particles--known as sigma-b baryons--are called bottom quarks, one of the six types of quarks that are fundamental constituents of matter.
This makes the top quark about 40 times heavier than the bottom quark.
Instead, researchers must study the details of how a top quark decays into a bottom quark and a W boson to deduce a value for this quantity.
The bottom quark, heaviest of the known quarks, has an experimentally determined mass of about 4.
Well if you smash two particles together and make a Higgs it may go on to form, say, two bottom quarks.
With this complete set, physicists will be able to cook up quark-gluon plasma, and observe things like bottom quarks and leptons.
We know exactly what signal we are looking for in our data, and we see strong indications of the production and decay of Higgs bosons in a crucial decay mode with a pair of bottom quarks, which is difficult to observe at the LHC.
About 3,500 times heavier than the electron, the tau lepton is a member of the same family of subatomic particles as the top and bottom quarks (SN: 7/1/95, p.
reported success in detecting significant numbers of B-particles, which result from the production and fragmentation of bottom quarks in high-energy collisions between protons and their oppositely charged counterparts, antiprotons.