Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
1,805,428,463 visitors served.
forum mailing list For webmasters
?
New: Language forums
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

down quark

   Also found in: Encyclopedia, Wikipedia 0.03 sec.
down quark
n. Abbr. d
A quark with a charge of - 1/3 , a mass about 20 times that of the electron, and a downward spin. It is a component of protons and neutrons. See Table at subatomic particle.
down quark  (doun)
A quark with a charge of -1/3. Its mass is greater than that of the electron and the up quark, but smaller than that of all the other quarks. See Table at subatomic particle.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.down quark - a stable quark with an electric charge of -1/3 and a mass 607 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"


How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Email
Feedback
Add definition
? Mentioned in ? References in periodicals archive
 
Ordinary matter, such as protons and neutrons, contains only up quarks and down quarks, whereas the sigma-bs each contain a bottom quark and either a pair of up quarks or a pair of down quarks.
Heavy finding by Science News
The quarks that behaved as expected were down quarks, and the one that didn't was an up quark.
Corrections by Science News
A typical nucleon includes three quarks: two down quarks and one up quark for a neutron; two up quarks and one down quark for a proton.
In neutrons and protons, quarks take wrong turns by Weiss, P. / Science News
More results
 
Dictionary/thesaurus browser? ? Full browser
 
 
Dictionary, Thesaurus, and Translations
?

Disclaimer | Privacy policy | Feedback | Copyright © 2009 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.