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Using untagged B^0 -> D K_S to determine gamma

M. Gronau·Y. Grossman·N. Shuhmaher·A. Soffer·J. Zupan
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Abstract

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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M. Gronau, Y. Grossman, N. Shuhmaher, A. Soffer, J. Zupan. 2004-06-02. Using untagged B^0 -> D K_S to determine gamma. https://doi.org/10.1103/physrevd.69.113003

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