Search for the in at near 10.6 GeV at belle.

Abstract

For the first time we search for the ηc2ð1DÞ in eþe− → γηc2ð1DÞ at ffiffi s p ¼ 10.52, 10.58, and 10.867 GeV with data samples of 89.5 fb−1, 711 fb−1, and 121.4 fb−1, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant ηc2ð1DÞ signal is observed in the mass range between 3.8 and 3.88 GeV=c2. The upper limit at 90% confidence level on the product of the Born cross section for eþe− → γηc2ð1DÞ and branching fraction for ηc2ð1DÞ → γhcð1PÞ is determined to be σðeþe− → γηc2ð1DÞÞBðηc2ð1DÞ → γhcð1PÞÞ < 4.9 fb at ffiffi s p near 10.6 GeV.