Lees, J. P.Poireau, V.Tisserand, V.Grauges, E.Palano, A.Eigen, G.Stugu, B.Izen, Joseph M.Lou, Xinchou2014-11-102014-11-102014-06-162014-06-161550-7998http://hdl.handle.net/10735.1/4160We study the processes γγ→K⁺K⁻η and γγ→K⁺K⁻π⁰ using a data sample of 519 fb⁻¹ recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e⁺e⁻ collider at center-of-mass energies at and near the Υ(nS) (n = 2, 3, 4) resonances. We observe η_c → K⁺K⁻π⁰ and η_c → K⁺K⁻η decays, measure their relative branching fraction, and perform a Dalitz plot analysis for each decay. We observe the K₀*(1430) → K η decay and measure its branching fraction relative to the K π decay mode to be R(K₀*(1430)) = ℬ(K₀*(1430) → K η) / ℬ(K₀*(1430) → K π) = 0.092 ± 0.025_(-0.025)^(+0.010). The η_c → K⁺K⁻η and K₀*(1430) → Kη results correspond to the first observations of these channels. The data also show evidence for η_c(2S) → K⁺K⁻π⁰ and first evidence for η_c(2S) → K⁺K⁻η.en-US©2014 American Physical SocietyDalitz plotsBranching fractions (Nuclear physics)KaonsPionsMesons--DecayTextLees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2014. "Dalitz plot analysis of η_c → K⁺K⁻η and η_c → K⁺K⁻π⁰ in two-photon interactions." Physical Review D 89(11), doi:10.1103/PhysRevD.89.1120048911