Search for the ηc2 (1D) in e+ e- → γηc2(1D) at √s near 10.6 GeV at Belle

For the first time we search for the eta(c2) (1D) in e(+) e(-) -> gamma eta(c2)(1D) at root s = 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 eta(c20) (1D) signal is observed in the mass range between 3.8 and 3.88 GeV/c(2). The upper limit at 90% confidence level on the product of the Born cross section for e(+)e(-) -> gamma eta(c2) (1D) and branching fraction for eta c2(1D) -> gamma h(c) (1P) is determined to be so e(+)e(-)-> gamma c(2) (1D)gamma B eta(c2()1D)-> gamma h(c) (1P)) < 4.9 fb at root s near 10.6 GeV.

Automated summary

In this study, the search for eta(c2)(1D) in e(+) e(-) -> gamma eta(c2)(1D) process was conducted at different root s values using data samples collected at the KEKB collider with the Belle detector. No significant signal was observed in the mass range, and the upper limit on the product of the Born cross section and branching ratio was determined to be less than 4.9 fb at a root s near 10.6 GeV.