Study of the decay Ds+? KS0KS0?+ and observation of an isovector partner to f0 (1710)

Abstract

Using e(+)e(-) annihilation data corresponding to a total integrated luminosity of 6.32 fb(-1) collected at center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform an amplitude analysis of the decay D-s(+) -> (KSKS0)-K-0 pi(+) for the first time. An enhancement is observed in the K(S)(0)K(S)(0)( )mass spectrum near 1.7 GeV/c(2), which was not seen in D-s(+) -> K+K- pi(+) in an earlier work, implying the existence of an isospin one partner of the f(0)(1710). The branching fraction of the decay D-s(+) ->(KSKS0)-K-0 pi(+ )is determined to be B(D-s(+) -> (KSKS0)-K-0 pi(+)) = (0.68 +/- 0.04(stat) +/- 0.01(syst))%.