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单词 quark
释义

Examplesofquark

quark
Until a few years ago, it was believed that some experiments showed the existence of "pentaquarks" exotic baryons made of four quarks and one antiquark.
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Baryons, along with mesons, are hadrons, meaning they are particles composed of quarks.
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Mesons are part of the hadron particle family, defined simply as particles composed of quarks.
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The phenomenon of uncertainty takes a quizzical glimpse at quarks and a world in constant flux.
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One simple solution exists: if at least one of the quarks of the standard model is massless, becomes unobservable; i.e. it vanishes from the theory.
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Thus, the sum of the quarks' spin was expected to be equal to the proton's spin.
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Physicists expected that the quarks carry all the proton spin.
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They are baryons containing no up or down quarks.
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Protons carry quarks, but the electroweak theory was concerned only with the electrons and neutrinos, with nothing postulated about quarks.
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Sea quarks are much less stable than their valence counterparts, and they typically annihilate each other within the interior of the hadron.
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Studies of heavier quarks are conducted in artificially created conditions, such as in particle accelerators.
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In the supersymmetry theory of particle physics, ordinary quarks and leptons have scalar partners that carry baryon and lepton numbers.
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His calculation showed that these contributions lead to an interaction between light quarks at low energies not present in the normal theory.
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Via quantum theory, protons and neutrons were found to contain quarksup quarks and down quarksnow considered elementary particles.
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In these, gluons that bind quarks together confer most of the particle mass.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/quark##
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更新时间:2025/2/10 20:02:34