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单词 upsilon particle
释义

> as lemmas

upsilon particle
b. . A meson with a mass of approx. 9.46 GeV that consists of a bottom quark bound to its antiquark. Also more fully upsilon particle. Frequently written Υ.
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the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > meson > [noun] > type of
tau1949
photomeson1950
theta1954
eta1961
omega meson1961
rho1961
phi meson1962
bottomonium1976
quarkonium1977
upsilon1977
1977 S. W. Herb et al. in Physical Rev. Lett. 1 Aug. 255/2 A reasonable designation for this enhancement is Υ(9·5).
1984 New Scientist 16 Aug. 20/1 The researchers were studying the energy region of the upsilon particle—formed from a bottom quark bound with its antiquark.
2012 N. Mee Higgs Force viii. 251 The interpretation of upsilon as a bottom-antibottom pair.
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