Cuts: 

                 XMEE >  2.6 .AND. BTEST( PRUDEMSK(2), 5 )  .OR.
     Mee(LNEL1,LNEL2) >  2.6 .AND. Prel.sel.(LNEL1,LNEL2)   .OR.
     Mee(LNMAX1,LNMAX2)> 2.6 .AND. Prel.sel.(LNMAX1,LNMAX2) .OR.
     Mee(LINES1,LINES2)> 2.6 .AND. Prel.sel.(LINES1,LINES2) 

PRUDEMSK(2) bits 1:8 are the bits for psi inclusive analysis in prude

XMEE, LNELx,LNMAXx,LINESx are variables in kinem.cde and the preliminary
selection requires for each candidate electron
 a)  Cerenkov associated in phi and theta 
 b)  At least 2 out of 3 hodoscopes associated
    (prelsel.FOR) 

Program is compiled by /code/e835code/psinc/src/trim_link_mdst

              
Efficiency of this selection on a clean Jpsi sample is ~96%