Difference: AtlasMeeting_29_10_08 (5 vs. 6)

Revision 62008-11-06 - KennyWraight

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AtlasMeeting_29_10_08

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 -- KennyWraight - 29 Oct 2008


CDF Note on dilepton analysis. Cross sections on page 10.
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<
<
Modesigma x Br (Pb)
K Factor
FilterEffic
Wgamma->e nu Gamma 13.6 x 1.36
1.36 1
Wgamma->mu nu Gamma 13.6 x 1.36
1.36 1
Wgamma->tau nu Gamma
13.6x1.36
136 1
WW 1.27 1.0 1
WW@NLO 1.27 1.0 1
WZ0.365
1.0 0.76
ZZ
1.511 1.0 0.23
ttbar 6.7x0.1026 1.0 1
Z->ee355
1.4 1
Z->mumu 355 1.41
Z->tautau (mll>10)
1272 1.4 0.00713
Z->ee (mll<20)
>
>
Modesigma x Br (Pb)
K Factor
FilterEffic
Wgamma->e nu Gamma 13.6 x 1.36
1.36 1
Wgamma->mu nu Gamma 13.6 x 1.36
1.36 1
Wgamma->tau nu Gamma
13.6x1.36
136 1
WW 1.27 1.0 1
WW@NLO 1.27 1.0 1
WZ0.365
1.0 0.76
ZZ
1.511 1.0 0.23
ttbar 6.7x0.1026 1.0 1
Z->ee355
1.4 1
Z->mumu 355 1.41
Z->tautau (mll>10)
1272 1.4 0.00713
Z->ee (mll<20)
  920
1.4 0.0156
Z->ee(mll<20)
920 1.4 0.0156
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  Wgamma produces a lepton plus a conversion lepton and the third lepton in the conversion is lost. This has a rapidity dependence since material increases with increasing |eta|. Same sign leptons are a good monitor of this background.
Changed:
<
<
The Drell Yan has a section below mll< 20 added to the mll>20 to get reasonable statistics for the spectrum down to mll of order 10-12 GeV. This is relevant for Higgs but perhaps not top.
>
>
The Drell Yan has a section below mll< 20 added to the mll>20 to get reasonable statistics for the spectrum down to mll of order 10-12 GeV. This is relevant for Higgs but perhaps not top.
  Cross sections taken at NLO are just given and those at LO with a k factor are indicated.
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Total 130+-15
Data 139
Changed:
<
<
It is interesting to compare the 70 ttbar events in 3fb-1 at 1960 GeV to the 140 that Kenny has in his talk with 14000 GeV. It will be interesting to compare the background to those shown above.
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>
It is interesting to compare the 70 ttbar events in 3fb-1 at 1960 GeV to the 140 that Kenny has in his talk with 14000 GeV. It will be interesting to compare the background to those shown above.
  The W+jet background is estimated from the data by taking dijet events, identifying one jet and asking how often the other passes loose lepton cuts compared to how often it passes full lepton id. This defines the fake probability. The single lepton sample is then searched and events with jets that are found to pass the loose lepton cuts are given a weight according to the measured probability. The kinematics and numbers of these events are then used in the analysis.
 
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