Joachim Meyer (DESY) SHORT PHYSICS SUMMARIES  :   CP VIOLATION 

  This is http://www-h1.desy.de/~jmeyer/physics/cpviol/welcome.html

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 Belle CP-violation 
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  BELLE paper     hep-ex/0107061
  
  Measure  A(t) = (B0 - B0_bar)/((B0 + B0_bar)  
                = - CP * sin(2*phi) * sin(Delta_m t)
 
     for CP = +1   J/Psi K0s
         CP = -1   J/Psi K0l
 
 Fig   rawdelta_t 
 shows the raw Delta_t distribution
 for q*CP = +-1 , with q = 1 for B0, -1 for B0_bar
  ===> CP-viol already visible here

 Fig   asymshows the asymmetries A(t) for 
 CP=1, CP=-1 and combined. 

 fitresult  sin(2*phi) = 0.99 =- 0.14 +- 0.06
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Babar CP-violation
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BABAR  paper  hep-ex/0107013
 
same procedure as Belle . Belle calls the angle phi, Babar beta

 Fig    asym shows Delta_t distributions and asymmetries A(t)
 
 fitresult  sin(2*beta)= 0.59 +- 0.14 +- 0.05

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