
sti cs on b events atLEP w i l lsoon al l ow to study pol ari zati on e ects i n a purel y b sam pl e,thati sforeseen to retai n m ostofthei ni ti alb-quark pol ari zati on,i . e. an orderofm agni tudel argerthan i n theprevi ousi ncl usi veanal ysi s.In refs.[ 16,25,26] and[ 27] ,som estudi esofexcl usi ve decaysofpol ari zed b arepresented.O fcourse,the am bi gui ti es i n the know l edge ofthe b-quark fragm entati on al so appl y to pol ari zati on m easurem ents based on sem i l eptoni c b-baryon decays.A rel evant questi on i s w hether, w i th a reasonabl e stati sti cs on sem i l eptoni c b decays (som e **data** are al ready avai l abl e[ 28] ),LEP **data** w i l lno l onger need to be norm al i zed w i th l ower-energy data. O ne coul d study the rati os hx N ' i b (P )=hx N ' i B ofthe l epton m om ents for the b sam pl e over those for the B -m eson sam pl e,both m easured at LEP.In thi s case,one gets
