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CKM $γ$ phase from $B \to K ππ$

Ignacio Bediaga·Gabriel Guerrer·Jussara M. de Miranda
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Abstract

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 $\sim 5^o$.

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Ignacio Bediaga, Gabriel Guerrer, Jussara M. de Miranda. 2007-03-12. CKM $γ$ phase from $B \to K ππ$. https://arxiv.org/abs/hep-ph/0703131

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