Study Of The Process E(+)E(-)-> K+K-Eta With The Cmd-3 Detector At The Vepp-2000 Collider

The process e(+)e(-)-> K+K-eta has been studied in the center-of-mass energy range from 1.59 to 2.007 GeV using the data sample of 59.5 pb(-1), collected with the CMD-3 detector at the VEPP-2000 e(+)e(-) collider in 2011, 2012 and 2017. The K+K-eta final state is found to be dominated by the contribution of the phi(1020)eta intermediate state. The cross section of the process e(+)e(-)->phi(1020)eta has been measured with a systematic uncertainty of 5.1% on the base of 3009 +/- 67 selected events. The obtained cross section has been used to calculate the contribution to the anomalous magnetic moment of the muon: a(mu)(phi eta)(E < 1.8 GeV) = (0.321 +/- 0.015(stat) +/- 0.016(syst)) x 10(-10), a(mu)(phi eta)(E < 2.0 GeV) = (0.440 +/- 0.015(stat) +/- 0.022(syst)) x 10(-10). From the cross section approximation the phi(1680) meson parameters have been determined with better statistical precision, than in previous studies. (C) 2019 The Authors. Published by Elsevier B.V.