Measurement of $D^0$ decays to $K^0_L π^0$ and $K^0_S π^0$ at Belle

Details Measurement of $D^0$ decays to $K^0_L π^0$ and $K^0_S π^0$ at Belle Measurement of $D^0$ decays to $K^0_L π^0$ and $K^0_S π^0$ at Belle

2001-07-27

arxiv.org/abs/hep-ex/0107078v2

Physics

High Energy Physics

High Energy Physics - Experiment

Paper submitted to the 2001 Lepton Photon Conference. Version 31-Jul-2001: REVTeX4 formatting problem fixed

Scientific paper

We present a preliminary measurement of the ratio of $D^0$ decay rates into $K^0_L \pi^0$ and $K^0_S \pi^0$ final states. This ratio can be used to disentangle the Cabibbo favored $D^0 \to \bar{K}^0\pi^0$ and doubly Cabibbo suppressed $D^0 \to K^0 \pi^0$ amplitudes, and contributes to the important goal of constraining the strong phase $\delta_{K \pi}$ between $D^0 \to K^- \pi^+$ and $D^0 \to K^+ \pi^-$. The measurement is based on a large data set accumulated by the Belle detector at the KEKB $e^+ e^-$ collider, with $K^0_L$ candidates reconstructed using hadronic clusters in the KLM ($K_L$ and $\mu$ identification system), together with a $D^0$ mass constraint and $D^{*+}$ tag.

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