The processes ηc′→ρ0ρ0, K*0K ̄*0, and are searched for using a sample of 1.06×108 ψ′ events collected with the BESIII detector at the BEPCII collider. No signals are observed in any of the three final states. The upper limits on the decay branching fractions are determined to be B(ηc′→ρ0ρ0)<3.1×10-3, B(ηc′→K*0K̄*0) <5.4×10-3, and B(ηc′→)<2.0×10 -3 at the 90% confidence level. The upper limits are lower than the existing theoretical predictions.
Search for eta '(c) decays into vector meson pairs
DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2011-01-01
Abstract
The processes ηc′→ρ0ρ0, K*0K ̄*0, and are searched for using a sample of 1.06×108 ψ′ events collected with the BESIII detector at the BEPCII collider. No signals are observed in any of the three final states. The upper limits on the decay branching fractions are determined to be B(ηc′→ρ0ρ0)<3.1×10-3, B(ηc′→K*0K̄*0) <5.4×10-3, and B(ηc′→)<2.0×10 -3 at the 90% confidence level. The upper limits are lower than the existing theoretical predictions.
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