Single Top Search

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Single Top Search
Likelihood function to valuate neutrino Pz
K Nakamura
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S-channel single top event _at_ CM Frame
ambiguity
CDFNOTE
Selection of bjet from top quark
t-channel tagged jet -gt 95
s-channel tagged jet -gt 53
top mass resolution 15 GeV
Selection of neutrino Pz solution
30 no solution
Mlnb for 4 cases
This Top Mass constraint gave some bias to Mlnb
distribution??
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Neutrino Solution
GenLev
Total 31871 event Dgt0 29289 event
8 no solution
Sim
Total 3943 event Dgt0 2824 event
28.4 no solution
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PWZ _at_GenLev
Bug is Fixed !
wrong
---- W ---- W-
correct
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PnZ _at_GenLev
To have pronounced tendency to separate W and
W-
wrong
correct
---- W ---- W-
P
P
Z
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PnZ Qlep _at_GenLev
---- correct ---- wrong
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PnZ Qlep _at_Sim
---- correct ---- wrong
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W mass
W has the mass as small as possible to keep
larger than Mt??
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MW _at_GenLev
wrong
correct
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MW _at_Sim
Using L4 jet
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Likelihood correlation check
MW
PnZ Qlep
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Probability Density Function
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Likelihood for Solution
---- correct ---- wrong
75.2
72.7
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Likelihood Function including no-solution case
To define a Likelihood as the function of
Neutrino Pz
Scanning as PnZ
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-2Log L distribution as the function of PnZ
First 6 events
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Neutrino Solution Check
_at_GenLev
_at_Sim
Choose Correct Solution
Result of the Likelihood fitting
What??
PnZ0 ??
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Likelihood distribution for the case of PnZ0
Most likely PnZ is really 0 ?? Is this
correct??
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