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"Bottom Quark"

From Andrew Zimmerman Jones,
Your Guide to Physics.
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Definition: A bottom quark (symbol b) is a third generation quark with the following properties:
  • Weak Isospin: -1/2
  • Bottomness (B'): 1
  • Charge (proportion of e): -1/3
  • Mass (in MeV/c2): 4100 to 4400
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