Abstract
The first dedicated search for the ηc2(1D) is carried out using the decays B+ → ηc2(1D)K+, B0 → ηc2(1D)\( {K}_S^0 \), B0 → ηc2(1D)π−K+, and B+ → ηc2(1D)π+\( {K}_S^0 \) with ηc2(1D) → hcγ. No significant signal is found. For the ηc2(1D) mass range between 3795 and 3845 MeV/c2, the branching-fraction upper limits are determined to be ℬ(B+ → ηc2(1D)K+) × ℬ(ηc2(1D) → hcγ) < 3.7 × 10−5, ℬ(B0 → ηc2(1D)K0) × ℬ(ηc2(1D) → hcγ) < 3.5 × 10−5, ℬ(B0 → ηc2(1D)π−K+) × ℬ(ηc2(1D) → hcγ) < 1.0 × 10−4, and ℬ(B+ → ηc2(1D)π+\( {K}_S^0 \)) × ℬ(ηc2(1D) → hcγ) < 1.1 × 10−4 at 90% C.L. The analysis is based on the 711 fb−1 data sample collected on the ϒ(4S) resonance by the Belle detector, which operated at the KEKB asymmetric-energy e+e− collider.
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The Belle collaboration., Chilikin, K., Adachi, I. et al. First search for the ηc2(1D) in B decays at Belle. J. High Energ. Phys. 2020, 34 (2020). https://doi.org/10.1007/JHEP05(2020)034
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DOI: https://doi.org/10.1007/JHEP05(2020)034