2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37866We present a preliminary measurement of the branching fraction and CP-violating parameters S and C for the decay B->omegaKs. The data sample corresponds to 232x10^6 BBbar pairs produced from e+e- annihilation at the Upsilon(4S) resonance. We measure B(omegaK0)=(5.9+/-1.0+/-0.4)x10^-6, S=0.50+0.34-0.38+/-0.02 and C=-0.56+0.29-0.27+/-0.03.16 pages, 3 postscript figues, contributed to Moriond EW05 RHigh Energy Physics - Experimenttext