Using untagged B0-->DKS to determine gamma

@article{Gronau2004UsingUB,
  title={Using untagged B0-->DKS to determine gamma},
  author={Michael Gronau and Yuval Grossman and Natalia Shuhmaher and A. Soffer and Jure Zupan},
  journal={Physical Review D},
  year={2004}
}
It is shown that the weak phase gamma=arg(-V_{ud}V^*_{ub}V_{cb}V_{cd}^*) can be determined using only untagged decays B/Bbar--> D K_S. In order to reduce the uncertainty in gamma, we suggest combining information from B^{+-}--> DK^{+-} and from untagged B^0 decays, where the D meson is observed in common decay modes. Theoretical assumptions, which may further reduce the statistical error, are also discussed. 
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