ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, vol. 84, p. -
Search for ηc′ decays into vector meson pairs
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. © 2011 American Physical Society.