ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, vol. 89, p. -
Measurement of χcJ decaying into η′K+K-
Using (106.41±0.86)×106ψ(3686) events collected with the BESIII detector at BEPCII, we study for the first time the decay χcJ→η′K+K- (J=1, 2), where η′→γρ0 and η′→ηπ+π-. A partial wave analysis in the covariant tensor amplitude formalism is performed for the decay χc1→η′ K+K-. Intermediate processes χc1→η′f0(980), χc1→η′f0(1710), χc1→η′f2′(1525) and χc1→K0*(1430)±K (K0*(1430) ±→η′K±) are observed with statistical significances larger than 5σ, and their branching fractions are measured. © 2014 American Physical Society.