For the first time we search for the η_c2(1D) in e+e−→γη_c2(1D) at √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 η_c2(1D) 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 e+e−→γη_c2(1D) and branching fraction for η_c2(1D)→γh_c(1P) is determined to be σ(e+e−→γη_c2(1D))B(η_c2(1D)→γh_c(1P)) < 4.9 fb at √s near 10.6 GeV.
Search for the η_c2(1D) in e+e−→γη_c2(1D) at √s near 10.6 GeV at Belle
De Pietro, G.;Tenchini, F.;
2021-01-01
Abstract
For the first time we search for the η_c2(1D) in e+e−→γη_c2(1D) at √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 η_c2(1D) 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 e+e−→γη_c2(1D) and branching fraction for η_c2(1D)→γh_c(1P) is determined to be σ(e+e−→γη_c2(1D))B(η_c2(1D)→γh_c(1P)) < 4.9 fb at √s near 10.6 GeV.File in questo prodotto:
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