Extraction of the CP-violating phase γ using B → K π π and B → K K K ˉ decays

摘要

Using theBaBarmeasurements of the Dalitz plots forB0→K+π0π?,B0→K0π+π?,B+→K+π+π?,B0→K+K0K?, andB0→K0K0Kˉ0decays, we demonstrate that it is possible to cleanly extract the weak phaseγ. We find four possible solutions. Three of these – 32°, 259°, and 315° – are in disagreement with the SM, while one – 77° – is consistent with the SM. An advantage of this Dalitz-plot method is that one can obtain many independent measurements ofγ, thereby reducing its statistical error. An accurate determination of the errors, however, requires detailed knowledge of the data.