Comment on "Weak phase gamma using isospin analysis and time-dependent asymmetry in B(d)-->K(S)pi(+)pi(-)".

  title={Comment on "Weak phase gamma using isospin analysis and time-dependent asymmetry in B(d)-->K(S)pi(+)pi(-)".},
  author={Michael Gronau},
  journal={Physical review letters},
  volume={91 13},
          139101; author reply 139102
  • M. Gronau
  • Published 13 May 2003
  • Physics, Medicine
  • Physical review letters
We comment on a recent suggestion for measuring $\gamma$ in $B^0(t)\to K_S\pi^+\pi^-$. A difficulty is pointed out in relating electroweak penguin and tree amplitudes in $B^+\to K^0\pi^+\pi^0$, which is crucial for an implementation of this method. We clarify the necessary condition for such a relation. 
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