# B0 Mixing (1)

- ## Mass Splitting:

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- fB = B0 decay constant = 180 40
- BB = Bag factor = 1.0 0.15
- = perturbative QCD = 0.55 0.01
- F = known function of t,W masses

- ## CKM Parameters ( Wolfenstein):

  |Vts | 2 ~ ( Vcb , ~ 8 % )
  |Vtd |2 ~ CP
  - (fBd 2BBd ) ~ 30 % error !

- ## Use the ratio:

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< 10 % error !

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