1303.0846 (Bhubanjyoti Bhattacharya et al.)

Direct measurement of $γ$ using $B \to K ππ$ and $B \to K K
{\bar K}$ decays    [PDF]

Bhubanjyoti Bhattacharya, Maxime Imbeault, David London

Using the B{\sc a}B{\sc ar} measurements of the Dalitz plots for $B^0 \to K^+\pi^0\pi^-$, $B^0 \to K^0\pi^+\pi^-$, $B^+ \to K^+\pi^+\pi^-$, $B^0 \to K^+ K^0 K^-$, and $B^0 \to K^0 K^0 {\bar K}^0$ decays, we cleanly extract the weak phase $\gamma$. We find four possible solutions: $(31^{+2}_{-3})^\circ$, $(77 \pm 3)^\circ$, $(258^{+4}_{-3})^\circ$, and $(315^{+3}_{-2})^\circ$. In all cases the error includes first-order flavor-SU(3) breaking effects. One solution -- $(77 \pm 3)^\circ$ -- is consistent with the standard model; its error is far smaller than that obtained using two-body B decays.

View original: http://arxiv.org/abs/1303.0846