CKM $γ$ phase from $B \to K ππ$

Details CKM $γ$ phase from $B \to K ππ$ CKM $γ$ phase from $B \to K ππ$

2007-03-12

arxiv.org/abs/hep-ph/0703131v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures. To appear in the proceedings of the 4th International Workshop on the CKM Unitarity Triangle, december 12-

Scientific paper

We discuss a method to extract the CKM $\gamma$ angle combining Dalitz plot analysis of $B^{\pm} \to K^{\pm} \pi^+ \pi^-$ and untagged $B^0$, $\bar B^0 \to K_s \pi^+ \pi^-$. 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} \pi^{\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 $\gamma$ with a precision of $\sim 5^o$.

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