Effects of $ {K^0}-{{overline{K}}^0} $ mixing on determining γ from B ± → DK ±

摘要

A bstract The decay B _(±)→ DK _(±)followed by the subsequent decay of the D meson into final states involving a neutral kaon can be used to determine the CKM angle γ . We study CP violation effects due to mixing and decay of the final state kaon. We find that ignoring these effects produces a shift in γ of order ? ~( K )/ r ~( B ), an enhancement of 1/ r ~( B )compared to the naive expectation. We then show how to take these effects into account such that, in principle, they will not introduce any theoretical error in the extraction of γ .