CDF Preliminary 2.7 fb^-1.0
Tight Lepton Background Predication and Event Yields
Two Secvtx Tag Events

Process	2jets	3jets	4jets	5jets
All Pretag Candidates	45000	7600	1700	380
WW	0.30 ± 0.059	0.29 ± 0.051	0.17 ± 0.027	0.076 ± 0.012
WZ	3.3 ± 0.37	0.94 ± 0.11	0.19 ± 0.024	0.039 ± 0.0050
ZZ	0.099 ± 0.011	0.073 ± 0.0080	0.019 ± 0.0020	0.0050 ± 0.0010
Top Pair Prod	26 ± 4.2	77 ± 12	100 ± 16	36 ± 5.9
Single Top s-Channel	9.6 ± 1.2	3.3 ± 0.41	0.72 ± 0.092	0.15 ± 0.020
Single Top t-Channel	2.2 ± 0.30	1.9 ± 0.26	0.53 ± 0.072	0.10 ± 0.014
Z+Jets	1.4 ± 0.20	0.95 ± 0.13	0.26 ± 0.038	0.085 ± 0.013
W+bottom	55 ± 22	18 ± 7.4	4.9 ± 2.0	1.2 ± 0.55
W+charm	4.9 ± 2.0	2.4 ± 1.0	0.94 ± 0.40	0.25 ± 0.12
Mistags	1.4 ± 0.39	0.93 ± 0.30	0.34 ± 0.12	0.10 ± 0.047
Non-W	9.0 ± 4.0	5.0 ± 2.0	0.74 ± 1.6	0.23 ± 1.5
Total Prediction	110 ± 25	110 ± 16	110 ± 17	38 ± 6.1
Observed	110	130	100	42