Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any meson, such as an upsilon particle, formed from a bottom quark and its antiquark.

Etymologies

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Examples

  • Both facilities can be tuned to produce excited states of "heavy quarkonia" mesons such as bottomonium, which is made from bottom and anti-bottom quarks.

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  • In 2008 researchers on the BELLE experiment at the KEK Laboratory in Japan looked at how an excited state of the meson "bottomonium" decayed and were very surprised to find that one particular decay mode was much more common than expected.

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  • Now, physicists in Germany and Pakistan have proposed an extraordinary explanation - instead of producing bottomonium, the experiment had created a new particle containing four quarks.

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  • In 2008 BELLE physicists were studying decays of the highly excited Y (5S) state of bottomonium.

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