Preliminary ZZ cross-sections @ 189 GeV

Analyses

e CUT (%)

NZZNC2

Nbkg(cut)

Nexpected

Nobs

D s exptd (pb)

s ZZNC2 (pb)

qqqq(cut)

23.1

25.7

80.6

106.3

96

0.23

0.40± 0.20

qqqq(NN)

15.7

17.5

22.6

40.1

35

0.22 (0.24)

0.41± 0.20

t t qq

2.1

2.3

1.04

3.3

3

0.53

0.57± 0.50

llqq

8

9

1.6

10.6

12

0.24

0.75± 0.25

qquu(cut)

13.7

15.2

13.7

28.9

28

0.23

0.61± 0.22

qquu(NN)

17.3

19.2

24.2

43.4

37

0.21(0.23)

0.43± 0.21

Lluu (cut)

1.2

1.35

2.3

3.7

2

0.92

lluu(wis)

1.2

1.35

1

2.4

2

0.72

0.51± 0.70

Total A

46.2

51.3

98.2

149.5

138

0.13

0.57± 0.12

Total W

44.3

49.4

50.4

99.8

89

0.12

0.58± 0.12

The qqqq(cut) analysis has 15% efficiency for t t qq which is taken into account

Numbers in parentheses are obtained when an optimal cut is performed on the

NN output instead of a fit to the NN output distribution (after the cut is applied)

Overlaps between channels are properly taken into account for the cross section result