The first dedicated search for the ηc2(1D) is carried out using the decays B+→ηc2(1D)K+, B0→ηc2(1D)K0S, B0→ηc2(1D)π−K+, and B+→ηc2(1D)π+K0S 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)K0S)×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+K0S)×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.
First search for the ηc2(1D) in B decays at Belle
Tenchini, F.;
2020-01-01
Abstract
The first dedicated search for the ηc2(1D) is carried out using the decays B+→ηc2(1D)K+, B0→ηc2(1D)K0S, B0→ηc2(1D)π−K+, and B+→ηc2(1D)π+K0S 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)K0S)×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+K0S)×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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


