| 11. | However a contains one up, one strange, and one bottom quark, while a contains one up and two bottom quarks.
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| 12. | However a contains one up, one strange, and one bottom quark, while a contains one up and two bottom quarks.
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| 13. | The heavier scalar mesons containing charm and / or bottom quarks all occur well over 2 GeV / c 2.
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| 14. | Each B meson has an antiparticle that is composed of a bottom quark and an charm antiquark ( ) respectively.
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| 15. | So, since the strange and bottom quarks have a negative charge, they have flavor quantum numbers equal to " 1.
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| 16. | This allows us to measure, for example, bottom quarks which decay into a relatively long-lived B-meson through " topological " cuts.
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| 17. | Bottom quarks have ( by convention ) a bottomness of & minus; 1 while bottom antiquarks have a bottomness of + 1.
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| 18. | It was first observed by the BaBar experiment at SLAC in 2008, and is the lightest particle containing a bottom and anti-bottom quark.
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| 19. | By the time it can interact strongly it has already decayed to another flavour of quark ( usually to a bottom quark ).
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| 20. | And while other producers have been busy taking meetings, Lederman has been discovering the muon neutrino, the neutral K-meson and the bottom quark.
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