CKM $γ$ phase from $B \to K ππ$

Bediaga, Ignacio; Guerrer, Gabriel; de Miranda, Jussara M.

CKM $γ$ phase from $B \to K ππ$

Authors

Bediaga, Ignacio

Guerrer, Gabriel

de Miranda, Jussara M.

Description

We discuss a method to extract the CKM $γ$ angle combining Dalitz plot analysis of $B^{\pm} \to K^{\pm} π^+ π^-$ and untagged $B^0$, $\bar B^0 \to K_s π^+ π^-$. The method also allows obtaining the ratio and phase difference between the {\it tree} and {\it penguin} contributions from $B^0$ and $\bar B^0 \to K^{*\pm} π^{\mp} $ decays and direct CP asymmetry between $B^0$ and $\bar{B^0}$. From Monte Carlo studies of 100K events for the neutral mesons, we show the possibility of measuring $γ$ with a precision of $\sim 5^o$.
4 pages, 2 figures. To appear in the proceedings of the 4th International Workshop on the CKM Unitarity Triangle, december 12-16 2006, Nagoya, Japan