Study of the Decay and Production Properties of <i>D</i>_s1 (2536) and <i>D</i>_s2* (2573)

The e(+)e(-) -> Ds+Ds1 (2536)(-) and e(+)e(-) -> Ds+Ds2*(2573)(-) processes are studied using data samples collected with the BESIII detector at center-of-mass energies from 4.530 to 4.946 GeV. The absolute branching fractions of D-s1(2536)(-) -> (D) over barK-0(-) and D-s2(2573)(-) -> (D) over bar K-0(-) are measured for the first time to be (35.9 +/- 4.8 +/- 3.5)% and (37.4 +/- 3.1 +/- 4.6)%, respectively. The e(+)e(-) -> Ds+Ds1 (2536)(-) and e(+)e(-) -> 2D(s)(+)D(s2)(2573)(-) cross sections are measured, and a resonant structure at around 4.6 GeV with a width of 50 MeV is observed in both processes with a statistical significance of 7.2 sigma and 15 sigma, respectively. The state is observed for the first time in e(+)e(-) -> Ds+Ds2 (2573)(-) and could be the Y(4626) found by the Belle oration in the Ds+Ds1(2536)(-) final state, since they have similar masses and widths. There is also evidence for a structure at around 4.75 GeV in both processes.