Experimental studies of e + e −→ some charmless processes containing K S 0 at \sqrt{s}=3.773 and 3.65 GeV

We measure the observed cross sections for the charmless processes e + e −→K S 0 K − K − K + π ++ c.c., K S 0 K − π + η+c.c., K S 0 K − π + π + π − η+c.c., K S 0 K − K − K + π + η+c.c., K S 0 K − K − K + π + π 0+c.c., K S 0 K − ρ ++c.c. and K S 0 K − π + ρ 0+c.c. We also extract upper limits on the branching fractions for ψ(3770) decays into these final states at 90% C.L. Analyzed data samples correspond to 17.3 pb−1 and 6.5 pb−1 integrated luminosities registered, respectively, at \(\sqrt{s}=3.773\) and 3.65 GeV, with the BES-II detector at the BEPC collider.