S.Olsen CSU 3/15/96  OHP 2

       Use 3-4 track DST's  94 and 95 data

preselection:     -4 charged tracks                   94 data     95 data 
                  -net charge = 0
                  < 2 muons
                  < 2 electrons
                  |cos\theta|<0.74 all tracks         154072       291186

                  4-c fit to pi+pi-k+k-  (chisq<50)     2944         5323

selection (see fig 1)

                 chisq(pi+pi-mu+mu-)>chisq(pi+pi-k+k-)  1364         2417
                 chisq(pi+pi-k+k-)<12.                   655         1177
                 M_{pi+pi-} < 2.4 GeV                    464          848
                 1.05 <M_{k+k-} < 3.0 GeV                239          420
                 |M_{pi+pi-} - 0.77| > 0.12 GeV          174          286


           Fig 2a shows M_{k+pi-} recoiling against k*bar (+/- 90 MeV)
                  plus M_{k-pi+} recoiling against k* (+/- 90 MeV)

               note: here k* k*bar events are double counted. 

           Fig 2b shows M_{k+pi-} vs M_{k-pi+} scatterplot

Fit to k*(890) BW + k*_2(1430) BW + background

   F_{pkg} = Par_1[ Q^{1/2} + Par_2*Q^{3/2} + Par_3*Q^{5/2}]  Q > 0
           = 0                                                Q < 0     
   (Q = M(kpi) - M_k - M_{pi}

   M(k*) = 0.896 GeV (fixed)     Gamma(k*0) = 0.050 GeV (fixed)
   M(k*_2) = 1.432 GeV (fixed)     Gamma(k*_2) = 0.109 GeV (fixed)

           Fig 3 shows fit results:

           2N_{k*k*bar) = 36.6 +/- 9.3 evnts

           N_{k* k*_2bar + cc) = 6.9 +/- 7.2 evnts  ( < 16.1 evnts @ 90% CL)