Based on (2.712 +/- 0.014) x 10(9) psi(3686) events collected with the BESIII detector, the decays chi(cJ) -> p (p) over barK(S)(0)K(S)(0)(J = 0, 1, 2) are observed for the first time with statistical significances exceeding 5s. The measured branching fractions are B(chi(c0) -> p (p) over barK(S)(0)K(S)(0)) = (7.25 +/- 0.28 +/- 0.35) x 10(-5), B(chi(c1) -> p (p) over barK(S)(0)K(S)(0)) = (1.33 +/- 0.12 +/- 0.07)x10(-5), and B(chi(c2) -> p (p) over barK(S)(0)K(S)(0)) = (2.51 +/- 0.16 +/- 0.12) x10(-5), where the first uncertainties are statistical and the second systematic. In addition, no significant structures are observed in the p (p) over bar, pK(S)(0), and (p) over barK(S)(0) mass spectra.
For complete list of authors see http://dx.doi.org/10.1103/kcys-whfc