BEGIN BELLE ! experiment name BRECO ! BRECO tagged, electrons only PRELIMINARY ! Submitted to PRD hep-ex/0610012 "Assume BR(B->Xulnu)=0.22%" MEASUREMENT Rp0 stat syst DATA Rp0 stat syst 1.069 0.040 0.026 DATA bllunc% dstff% -1.6 -0.1 bfdds% dssff% rdd% -0.7 -0.6 -1.3 b2ulnu% b2d2e% secon% -0.5 -0.4 -0.7 END