Study of the Xi_c^0 decay asymmetry parameters in Xi_c^0 o Xi^- pi^+ weak decay

Abstract

We have studied on the measurement of the $\Xi_c^0$ decay asymmetry parameters in $\Xi_c^0 o \Xi^- \pi^+$ with a sample of 670/fb data set from the Belle experiment performed at the KEKB asymmetric $e^+e^-$ collider. CLEO experiment reported it to -0.56 +-0.39 with about 5/fb data. Therefore, we can expect more precise value of the decay asymmetric parameter from Belle. In this report we demonstrate how to extract it with both Monte Carlo and real data set.