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Search for Standard Model Higgs Boson
Production in Association with a W Boson using Bayesian Neural Networks with
5.7fb^-1 of CDF data
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<td style="vertical-align: top; background-color: rgb(0, 102, 0);"><small><small><small><small><small><small>&nbsp;</small></small></small></small></small></small><br></td>
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<td style="vertical-align: top; background-color: rgb(51, 153, 153);"><big><big><big><span style="color: rgb(255, 255, 204);"><small>&nbsp; </small><br><span style="color: rgb(255, 255, 153); font-weight: bold;">
Search for Standard Model Higgs Boson
Production in Association with a W Boson using Neural Networks with
5.7fb<sup>-1</sup> of CDF data
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<small> </small></span></big><small></small></big><small></small></big></td>
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<td style="vertical-align: top; background-color: rgb(0, 102, 0);"><small><small><small><small><small><small><small>&nbsp; </small></small></small></small></small></small></small><br>
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<center><big><b>
<a href="#abs">- Abstract -</a><br>
<a href="#sel">- Event Selection -</a><br>
<a href="#nnb">- NN b-jet energy correction -</a><br>
<a href="#var">- Bayesian Neural Network Inputs -</a><br>
<a href="#output">- Bayesian Neural Network Output -</a><br>
<a href="#sys">- Systematics - </a><br>
<a href="#res">- Results - </a><br>
<a href="#fullres">- Full Combined Results - </a><br>
</b></big><b></b></center>
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<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;"><big><big><span style="color: rgb(255, 255, 255);">Abstract:</span></big></big><br>
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<td style="vertical-align: top;"> <br>
We present a search for Standard Model Higgs boson decaying to two
b-quarks and produced in association with a W boson. This search uses
data corresponding to an integrated luminosity of 5.7/fb. We select
events with a high-pT lepton, a neutrino, and two jets.
We require at
least one of the jets to be identified as a b-quark jet (tagged) using
three different tagging algorithms (SECVTX, JetProb and NN b-tagging).
The discrimination between the Higgs signal and the large backgrounds in
the W + 2 jets bin is increased through the use of an Bayesian
neural network. We see no evidence for an excess of Higgs signal in the NN
output distribution. We set a 95% confidence level upper limit on the
WH cross section times the branching ratio of the Higgs to decay to a
bbbar pair, expressed as a ratio to the SM cross section:
<br>
<center>
σ(ppbar -&gt; WH)*BR(H-&gt;bbbar) &lt; 4.47 x SM observed (3.48 expected) at M(H) = 115 GeV/c<sup>2</sup> <br>
σ(ppbar -&gt; WH)*BR(H-&gt;bbbar) &lt; 1.98 to 44.3 x SM for M(H) = 100 to 150 GeV/c<sup>2</sup>
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<!-- <a href="http://www-cdf.fnal.gov/cdfnotes/cdf***.ps">Public Analysis Note</a> -->
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<big><big><span style="color: rgb(255, 255, 255);">Event Selection: </span></big></big><br>
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We analyze 5.7/fb of events recorded triggers for
high pT electrons, muons, large missing transverse energy plus 2 jets
(MET + 2 Jets Trigger), and large missing transverse energy (MET trigger).
We require events to have a high-pT lepton
candidate, large missing transverse energy, and two jets with at least
one b-tag with SECVTX. We classify our events into 3 lepton categories: central
triggered electrons and muons, forward (plug) triggered electrons,
and non-triggered leptons (isolated tracks). Recently, we added an additional loose
isolated track lepton category by requiring an isolated track with significant deposits of
energy in the calorimeter. These newly selected events are primary from the leptonic decay of
W where the electron failed the standard identification or the tau decays in one-prong.
Each lepton sample has distinct backgrounds and triggers requirements,
and so has a different set of event selection cuts. The following tables
summarize the cuts:
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<td colspan="5"> Event Selection of Tight Leptons from Lepton Triggered Events </td>
</tr>
<tr align="center" bgcolor="#cc9999">
<td>Category</td><td>Double SECVTX</td><td>One SECVTX + One JetProb</td><td>One SECVTX + One NN b-tag</td><td>One SECVTX </td>
</tr>
<tr align="center" bgcolor="#66ccff">
<td>Lepton</td><td colspan="4"> Central isolated electron or muon, or Plug isolated electron (Pt&gt;20 GeV)</td>
</tr>
<tr align="center" bgcolor="#66ff00">
<td>Missing Et</td><td colspan="4"> &gt; 20 GeV(Central), &gt; 25 GeV(Plug)</td>
</tr><tr align="center" bgcolor="#ff3399">
<td>Two Jets</td><td colspan="4"> &gt; 20 GeV, |η| &lt; 2.0</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (one jet)</td><td colspan="4">tight SecVtx b-tag</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (another jet)</td><td>tight SecVtx b-tag</td><td>JetProb b-tag</td><td>NN b-tag</td><td bgcolor="#ffffff">No b-tag</td>
</tr><tr align="center" bgcolor="#66ff00">
<td>QCD veto</td><td colspan="3">Plug electron only</td><td>QCD Veto</td>
</tr>
</tbody></table>
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<br><br>
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<td colspan="5"> Event Selection of Tight Isolated Tracks from (MET + 2 Jets / MET) triggered Events </td>
</tr><tr align="center" bgcolor="#cc9999">
<td>Category</td><td>Double SECVTX tag</td><td>One SECVTX + One JetProb</td><td>One SECVTX + One NN b-tag</td><td>One SECVTX tag</td>
</tr><tr align="center" bgcolor="#66ccff">
<td>Lepton</td><td colspan="4"> Isolated track (Pt &gt; 20 GeV), matching to no jet (Et&gt;20 GeV) in cone 0.4</td>
</tr><tr align="center" bgcolor="#66ff00">
<td>Missing Et</td><td colspan="4"> &gt; 20 GeV </td>
</tr><tr align="center" bgcolor="#ff3399">
<td>Two Jets</td><td colspan="4"> &gt; 25 GeV (MET + 2 Jets), &gt; 20 GeV (MET), |η| &lt; 2.0</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (one jet)</td><td colspan="4">tight SecVtx b-tag</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (another jet)</td><td>tight SecVtx b-tag</td><td>JetProb b-tag</td><td>NN b-tag</td><td bgcolor="#ffffff">No b-tag</td>
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<td>QCD Veto </td><td colspan="3">No QCD Veto</td><td>QCD Veto</td>
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<td style="vertical-align: top;">
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/new.gif"> <img src="10239_WHNN_5.7fb_main_files/new.gif" hspace="200" width="50"></a>
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<td colspan="5"> Event Selection of Loose Isolated Tracks from (MET + 2 Jets / MET) triggered Events </td>
</tr><tr align="center" bgcolor="#cc9999">
<td>Category</td><td>Double SECVTX tag</td><td>One SECVTX + One JetProb</td><td>One SECVTX + One NN b-tag</td><td>One SECVTX tag</td>
</tr><tr align="center" bgcolor="#66ccff">
<td>Lepton</td><td colspan="4"> Isolated track (Pt &gt; 20 GeV), matching to a jet (Et&gt;20 GeV) in cone 0.4</td>
</tr><tr align="center" bgcolor="#66ff00">
<td>Missing Et</td><td colspan="4"> &gt; 20 GeV, not pointing to any jets in cone 0.4 </td>
</tr><tr align="center" bgcolor="#ff3399">
<td>Two Jets</td><td colspan="4"> &gt; 20 GeV (MET + 2 Jets), &gt; 20 GeV (MET), |η| &lt; 2.0</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (one jet)</td><td colspan="4">tight SecVtx b-tag</td>
</tr><tr align="center" bgcolor="#cc66ff">
<td>b-tagging (another jet)</td><td>tight SecVtx b-tag</td><td>JetProb b-tag</td><td>NN b-tag</td><td bgcolor="#ffffff">No b-tag</td>
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<td>QCD Veto </td><td colspan="4"> QCD Veto (W Transverse mass &gt;10 GeV)</td>
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<br>
We estimate our expected background contribution to the sample in each
lepton type and tag category. The following plots show our expected
and observed number of background events as a function of jet
multiplicity. Our search region is the two jet bin. The other
jet bins are control regions.<br><br>
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<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/nJetBin_STST_CEMCMUPCMX.eps"> <img src="10239_WHNN_5.7fb_main_files/nJetBin_STST_CEMCMUPCMX.gif" width="300"> </a>
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<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/nJetBin_STST_PHX.eps"> <img src="10239_WHNN_5.7fb_main_files/nJetBin_STST_PHX.gif" width="300"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/nJetBin_STST_IsoTrkNew.eps"> <img src="10239_WHNN_5.7fb_main_files/nJetBin_STST_IsoTrkNew.gif" width="300"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/Njet/njplot_ISOTKh_STST.eps"> <img src="10239_WHNN_5.7fb_main_files/njplot_ISOTKh_STST.gif" height="300" width="300"> </a>
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<td>
2 SECVTX Tag Central Triggered Lepton Events
</td>
<td>
2 SECVTX Tag Plug Triggered Electron Events
</td>
<td>
2 SECVTX Tag Tight Isolated Track Events
</td>
<td>
2 SECVTX Tag Loose Isolated Track Events
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<td colspan="3" align="center">
<!--a href="./background.html">More Background Plots and Tables</a-->
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<br><br>
More Background Plots and Tables
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<td> Lepton Type </td>
<td> One Tag </td>
<td> Two SECVTX Tags </td>
<td> One SECVTX + One JETPROB tag </td>
<td> One SECVTX + One NN b-tag </td>
</tr>
<tr>
<td> Central Triggered Leptons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_Central_1tag.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_Central_STST.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_Central_STJP.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_Central_STRoma.html"> Table and Jet Multiplicity </a> </td>
</tr>
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<td> Plug Triggered Electrons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_PHX_1tag.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_PHX_STST.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_PHX_STJP.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_PHX_STRoma.html"> Table and Jet Multiplicity </a> </td>
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<td> Tight Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_IsoTrk_1tag.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_IsoTrk_STST.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_IsoTrk_STJP.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/njet_IsoTrk_STRoma.html"> Table and Jet Multiplicity </a> </td>
</tr>
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<td> Loose Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/njet_IsoTrkh_1tag.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/njet_IsoTrkh_STST.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/njet_IsoTrkh_STJP.html"> Table and Jet Multiplicity </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/njet_IsoTrkh_STRoma.html"> Table and Jet Multiplicity </a> </td>
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<big><big><span style="color: rgb(255, 255, 255);">NN b-jet energy correction</span></big></big><br>
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<a name="abs"></a>
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<td style="vertical-align: top;"> <br>
The most sensitive variable for WH analysis is the dijet invariant
mass. Improvement on dijet mass resolution directly results in
improvement of the final sensitivity.
To further improve the dijet mass resolution, we develop a neural
network based b-jet energy correction method.<br>
Next plots are the example of the dijet invariant mass before and after NN b-jet correction.<br><br>
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<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/h_Mjj_data_2jet_STST_CEMCMUPCMX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_Mjj_data_2jet_STST_CEMCMUPCMX.gif" width="460"> </a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/h_Mjj_NNcorr_data_2jet_STST_CEMCMUPCMX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_Mjj_NNcorr_data_2jet_STST_CEMCMUPCMX.gif" width="460"> </a>
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<td><center>
Dijet invariant mass before (Left) and after (Right) NN b-jet energy correction<br>
(2 SECVTX Tag, Central lepton)
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<big><big><span style="color: rgb(255, 255, 255);">Bayesian Neural Network Inputs</span></big></big><br>
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<td style="vertical-align: top;"> <br>
We employ distinct Bayesian Neural Network discriminant functions which
were optimized for one of three tagging categories: double SECVTX tag,
one SECVTX tag + one JetProb/NN tag, and one SECVTX tag.
<!--We use BNN with 7 inputs, 8 hidden nodes, and one output node. --><br>
For each BNN function, we use next input variables.
<ul> <font color="red">double SECVTX tag</font>
<li><font color="blue"><b>Dijet invariant mass</b></font>: The invariant mass reconstructed from the two jets. For this variable, we apply NN b-jet energy correction. </li>
<li><font color="blue"><b>PT Imbalance</b></font>: The scalar sum of the lepton and jet transverse momenta minus the MET. </li>
<li><font color="blue"><b>M <sub>max</sub> (lep + ν + jet)</b></font>: The invariant mass of the lepton, MET and one of the two jets, where the jet is chosen to give the maximum invariant mass.</li>
<li><font color="blue"><b>Q x η<sub>lep</sub></b></font>: The charge of the lepton times the η of the lepton.</li>
<li><font color="blue"><b>Sum ET (loose jets)</b></font>: The scalar sum of the loose jet transverse energy. </li>
<li><font color="blue"><b>P<sub>T</sub>(W)</b></font>: The transverse momentum of the reconstructed W.</li>
<li><font color="blue"><b>H<sub>T</sub></b></font>: The scalar sum of the transverse energies of the jets, the lepton, and the MET.</li>
</ul>
<ul> <font color="red">one SECVTX tag + one JetProb/NN tag</font>
<li><font color="blue"><b>Dijet invariant mass</b></font>: Same variable as double SECVTX input. </li>
<li><font color="blue"><b>Sum ET (loose jets)</b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>Q x η<sub>lep</sub></b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>M <sub>min</sub> (lep + ν + jet)</b></font>: The invariant mass of the lepton, MET and one of the two jets, where the jet is chosen to give the minimum invariant mass.</li>
<li><font color="blue"><b>H<sub>T</sub></b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>P<sub>T</sub>(W)</b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>MET</b></font>: Missing transverse energy.</li>
</ul>
<ul> <font color="red">one SECVTX tag</font>
<li><font color="blue"><b>Dijet invariant mass</b></font>: Same variable as double SECVTX input. </li>
<li><font color="blue"><b>KIT Flavor Separator</b></font>: The neural network flavor separator to reduce no real b-quark jets. </li>
<li><font color="blue"><b>Sum ET (loose jets)</b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>Q x η<sub>lep</sub></b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>P<sub>T</sub>(W)</b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>H<sub>T</sub></b></font>: Same variable as double SECVTX input.</li>
<li><font color="blue"><b>MET</b></font>: Same variable as one SECVTX tag + one JetProb/NN tag input.</li>
<li><font color="blue"><b>PT Imbalance</b></font>: Same variable as double SECVTX input.</li>
</ul>
The following plots show the NN Inputs for pretag (control region) central leptons.
<br><br>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_Mjj_NNcorr_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_Mjj_NNcorr_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_PtImbal_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_PtImbal_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_Pt_LepMet_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_Pt_LepMet_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_Qeta_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_Qeta_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_SumLooseJetEt_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_SumLooseJetEt_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_maxMlvj_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_maxMlvj_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<br><br>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_minMlvj_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_minMlvj_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_Ht_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_Ht_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_Met_data_2jet_Pretag_CEMCMUPCMX.eps"><img src="10239_WHNN_5.7fb_main_files/h_Met_data_2jet_Pretag_CEMCMUPCMX.gif" border="0" width="420"></a>
<br>
<center>
<br>
<!-- a href="nnInputs.html">More NN Input Plots</a-->
More NN Input Plots
</center>
<center>
<table border="1">
<tbody><tr>
<td> Lepton Type </td>
<td> Pretag </td>
<td> One Tag </td>
<td> Two SECVTX Tags </td>
<td> One SECVTX + One JETPROB tag </td>
<td> One SECVTX + One NN b-tag </td>
</tr>
<tr>
<td> Central Triggered Leptons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_Central_Pretag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_Central_1tag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_Central_STST.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_Central_STJP.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_Central_STRoma.html"> Plots </a> </td>
</tr>
<tr>
<td> Plug Triggered Electrons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_PHX_Pretag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_PHX_1tag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_PHX_STST.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_PHX_STJP.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_PHX_STRoma.html"> Plots </a> </td>
</tr>
<tr>
<td> Tight Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_IsoTrk_Pretag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_IsoTrk_1tag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_IsoTrk_STST.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_IsoTrk_STJP.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnInputs_IsoTrk_STRoma.html"> Plots </a> </td>
</tr>
<tr>
<td> Loose Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnInputs_IsoTrkh_Pretag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnInputs_IsoTrkh_1tag.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnInputs_IsoTrkh_STST.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnInputs_IsoTrkh_STJP.html"> Plots </a> </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnInputs_IsoTrkh_STRoma.html"> Plots </a> </td>
</tr>
</tbody></table>
</center>
</td>
</tr>
</tbody>
</table>
<br><br><br>
<a name="output"></a>
<table style="text-align: left; width: 35%;" border="0" cellpadding="1" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; width: 15%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); width: 5%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;">
<big><big><span style="color: rgb(255, 255, 255);">Bayesian Neural Network Output (Control region) </span></big></big><br>
</td>
</tr>
</tbody>
</table>
<table style="width: 85%;" align="center" border="0" cellpadding="1" cellspacing="0" width="85%">
<!--<a name="abs"></a>-->
<tbody>
<tr>
<td style="vertical-align: top;"> <br>
The Bayesian neural network output is a value between 0 and 1. Values close to 1 correspond to "more signal-like", values
close to zero correspond to "less signal-like". We train a separate neural network for each Higgs signal mass.
The following plots show the BNN output before applying b-tagging (control region).<br><br>
<center>
<table border="1">
<tbody><tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_CEMCMUPCMX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_CEMCMUPCMX.gif" width="400"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/KinematicsLog/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_CEMCMUPCMX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_CEMCMUPCMX_002.gif" width="400"> </a>
</td>
</tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_PHX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_PHX_002.gif" width="400"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/KinematicsLog/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_PHX.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_PHX.gif" width="400"> </a>
</td>
</tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/Kinematics/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_IsoTrkNew.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_IsoTrkNew.gif" width="400"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/KinematicsLog/eps/h_NNout115_BNN_NNCorr_data_2jet_Pretag_IsoTrkNew.eps"> <img src="10239_WHNN_5.7fb_main_files/h_NNout115_BNN_NNCorr_data_2jet_Pretag_IsoTrkNew_002.gif" width="400"> </a>
</td>
</tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/BNNout/ISOTKh_hbnn115_Pretag_new.eps"> <img src="10239_WHNN_5.7fb_main_files/ISOTKh_hbnn115_Pretag_new.gif" width="400"> </a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/BNNout/ISOTKh_hbnn115_Pretag_newlog.eps"> <img src="10239_WHNN_5.7fb_main_files/ISOTKh_hbnn115_Pretag_newlog.gif" width="400"> </a>
</td>
</tr>
</tbody></table>
</center>
<br>
<center>
Bayesian Neural Network outputs before b-tagging, for both linear scale (Left) and log scale (Right).<br>
From top to bottom, Central leptons, Plug electrons, Tight isolated tracks, and Loose isolated tracks, respectively.
</center>
<table border="1">
<tbody><tr> </tr>
</tbody></table>
</td></tr>
</tbody>
</table>
<br><br><br>
<a name="output"></a>
<table style="text-align: left; width: 35%;" border="0" cellpadding="1" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; width: 15%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); width: 5%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;">
<big><big><span style="color: rgb(255, 255, 255);">Bayesian Neural Network Output (Signal region) </span></big></big><br>
</td>
</tr>
</tbody>
</table>
<table style="width: 85%;" align="center" border="0" cellpadding="1" cellspacing="0" width="85%">
<!--<a name="abs"></a>-->
<tbody>
<tr>
<td style="vertical-align: top;"> <br>The
following plots show the BNN output for all b-tagging categories
(signal region). Left plot shows normalized BNN output, middle (right)
plot shows BNN output with linear (log) scale.<br><br>
<br>
<table>
<tbody><tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutNorm/eps/BNN115_STST.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STST_002.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNout_all/eps/BNN115_STST.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STST.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutLog_all/eps/BNN115_STST.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STST_003.gif" border="0" width="420"></a>
</td>
</tr>
<tr>
<td align="center">
All Leptons, Double SECVTX tags (Normalized to a unit area)
</td>
<td align="center">
All Leptons, Double SECVTX tags (Linear scale)
</td>
<td align="center">
All Leptons, Double SECVTX tags (Log scale)
</td></tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutNorm/eps/BNN115_STJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STJP5_002.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNout_all/eps/BNN115_STJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STJP5_003.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutLog_all/eps/BNN115_STJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STJP5.gif" border="0" width="420"></a>
</td>
</tr>
<tr>
<td align="center">
All Leptons, One SECVTX + One JetProb tags (Normalized to a unit area)
</td>
<td align="center">
All Leptons, One SECVTX + One JetProb tags (Linear scale)
</td>
<td align="center">
All Leptons, One SECVTX + One JetProb tags (Log scale)
</td>
</tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutNorm/eps/BNN115_STRoma.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STRoma_003.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNout_all/eps/BNN115_STRoma.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STRoma_002.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutLog_all/eps/BNN115_STRoma.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_STRoma.gif" border="0" width="420"></a>
</td>
</tr>
<tr>
<td align="center">
All Leptons, One SECVTX + One NN tags (Normalized to a unit area)
</td>
<td align="center">
All Leptons, One SECVTX + One NN tags (Linear scale)
</td>
<td align="center">
All Leptons, One SECVTX + One NN tags (Log scale)
</td>
</tr>
<tr>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutNorm/eps/BNN115_Ex1tagJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_Ex1tagJP5.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNout_all/eps/BNN115_Ex1tagJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_Ex1tagJP5_002.gif" border="0" width="420"></a>
</td>
<td>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/BNNoutLog_all/eps/BNN115_Ex1tagJP5.eps"><img src="10239_WHNN_5.7fb_main_files/BNN115_Ex1tagJP5_003.gif" border="0" width="420"></a>
</td>
</tr>
<tr>
<td align="center">
All Leptons, One SECVTX tags (Normalized to a unit area)
</td>
<td align="center">
All Leptons, One SECVTX tags (Linear scale)
</td>
<td align="center">
All Leptons, One SECVTX tags (Log scale)
</td>
</tr>
<tr>
<!-- <td colspan=3 align="center">
<a href="nnOutput.html">More NN Output Plots</a>
</td> -->
</tr></tbody></table>
<br>
<center>
More NN Output Plots
</center>
<center>
<table border="1">
<tbody><tr>
<td> Central Triggered Leptons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnOutput_Central.html"> Plots </a> </td>
</tr>
<tr>
<td> Plug Triggered Electrons </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnOutput_PHX.html"> Plots </a> </td>
</tr>
<tr>
<td> Tight Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/nnOutput_IsoTrk.html"> Plots </a> </td>
</tr>
<tr>
<td> Loose Isolated Tracks </td>
<td><a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/nnOutput_IsoTrkh.html"> Plots </a> </td>
</tr>
</tbody></table>
</center>
</td>
</tr>
</tbody>
</table>
<br><br><br>
<a name="sys"> </a>
<table style="text-align: left; width: 35%;" border="0" cellpadding="1" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; width: 15%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); width: 5%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;">
<big><big><span style="color: rgb(255, 255, 255);">Systematics: </span></big></big><br>
</td>
</tr>
</tbody>
</table>
<table style="width: 85%;" align="center" border="0" cellpadding="1" cellspacing="0" width="85%">
<!--<a name="sys"> </a>-->
<tbody>
<tr>
<td style="vertical-align: top;"> <br>
We address systematic uncertainty on the signal acceptance
from several different sources:
<ul>
<li> Lepton reconstruction</li>
<li> Trigger </li>
<li> Initial and final state radiation, and Parton distribution functions </li>
<li> Jet energy scale </li>
<li> b-tagging scale factor </li>
<li> Luminosity </li>
</ul>
The following link shows the systematic uncertainty for each lepton/b-tag categories
due to each effect on the signal acceptance. <br><br>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/systematics.html">Systematics</a>
</td></tr></tbody>
</table>
<br>
<br>
<a name="res"></a>
<table style="text-align: left; width: 35%;" border="0" cellpadding="1" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; width: 15%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); width: 5%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;"><big><big><span style="color: rgb(255, 255, 255);">Results: </span></big></big><br>
</td>
</tr>
</tbody>
</table>
<table style="width: 85%;" align="center" border="0" cellpadding="1" cellspacing="0" width="85%">
<tbody>
<tr>
<td style="vertical-align: top;"> <br>
We perform a binned likelihood fit of the Bayesian neural network distribution where we
constrain the backgrounds to their estimated rates within uncertainties. For
optimal sensitivity, we perform a separate simultaneous search in each tag channel
and lepton category.<br>
The left plot and table show the combined result of the Central Lepton, Plug Electron, and Tight Isolated Track channel.
The right plot and table show the result of the Loose Isolated Track channel which we recently added.
We set a limit on WH production cross section times branching
ratio as a function of Higgs mass. We express our limits as a ratio to the Standard
Model Cross section.
<br><br>
<table border="1">
<tbody><tr>
<td> <center>
<br><br><br>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_main/plots/eps/Limit_5.7fb_noIsoTrkh.eps"> <img src="10239_WHNN_5.7fb_main_files/Limit_5.gif" border="0" width="550"> </a>
</center>
</td>
<td> <center>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/new.gif"> <img src="10239_WHNN_5.7fb_main_files/new.gif" hspace="200" width="50"></a><br>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_IsoTrkh/wh_isotkh_limits_5600pb.eps"> <img src="10239_WHNN_5.7fb_main_files/wh_isotkh_limits_5600pb.gif" border="0" width="550"> </a>
</center>
</td>
</tr>
<tr>
<td>
<center>
<center>
<strong><br>
<!-- CDF Preliminary 5.7 fb<sup>-1</sup> <br>-->
Limits for Central lepton, Plug electron, and Tight isolated track <br>
Rates relative to Standard Model Expectation<br><br>
</strong>
</center><table border="1">
<thead>
</thead>
<tbody><tr>
<td> Mass </td> <td> Observed </td><td> Expected </td>
</tr>
<tr><td> 100 </td><td>2.09 </td><td>2.46 </td></tr>
<tr><td> 105 </td><td>3.16 </td><td>2.74 </td></tr>
<tr><td> 110 </td><td>3.83 </td><td>3.15 </td></tr>
<tr><td> 115 </td><td>4.52 </td><td>3.50 </td></tr>
<tr><td> 120 </td><td>5.45 </td><td>4.19 </td></tr>
<tr><td> 125 </td><td>5.88 </td><td>5.19 </td></tr>
<tr><td> 130 </td><td>7.83 </td><td>6.59 </td></tr>
<tr><td> 135 </td><td>11.2 </td><td>9.01 </td></tr>
<tr><td> 140 </td><td>14.4 </td><td>12.5 </td></tr>
<tr><td> 145 </td><td>24.9 </td><td>18.3 </td></tr>
<tr><td> 150 </td><td>43.7 </td><td>29.9 </td></tr>
</tbody></table>
</center>
</td>
<td>
<center>
<center>
<strong><br>
<!-- CDF Preliminary 5.7 fb<sup>-1</sup> <br>-->
Limits for Loose isolated track <br>
Rates relative to Standard Model Expectation<br><br>
</strong>
</center>
<table border="1">
<thead>
</thead>
<tbody><tr>
<td> Mass </td> <td> Observed </td><td> Expected </td>
</tr>
<tr><td> 100 </td><td>5.0 </td><td>10.6 </td></tr>
<tr><td> 105 </td><td>6.0 </td><td>11.8 </td></tr>
<tr><td> 110 </td><td>7.2 </td><td>13.0 </td></tr>
<tr><td> 115 </td><td>9.3 </td><td>15.3 </td></tr>
<tr><td> 120 </td><td>13.0 </td><td>17.9 </td></tr>
<tr><td> 125 </td><td>17.3 </td><td>22.3 </td></tr>
<tr><td> 130 </td><td>23.5 </td><td>28.0 </td></tr>
<tr><td> 135 </td><td>32.0 </td><td>38.1 </td></tr>
<tr><td> 140 </td><td>53.5 </td><td>56.0 </td></tr>
<tr><td> 145 </td><td>73.2 </td><td>77.0 </td></tr>
<tr><td> 150 </td><td>123.7 </td><td>132.6 </td></tr>
</tbody></table>
</center>
</td>
</tr>
</tbody></table>
<br>
<br>
<a name="fullres"></a>
<table style="text-align: left; width: 30%; margin-left: -8%; margin-right: auto;" border="0" cellpadding="1" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; width: 15%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); width: 5%;"><br>
</td>
<td style="vertical-align: top; background-color: rgb(0, 51, 0); text-align: left;"><big><big><span style="color: rgb(255, 255, 255);">Full combined results: </span></big></big><br>
</td>
</tr>
</tbody>
</table><br>
Finally, we perform a binned likelihood fit of the Bayesian neural network distribution
for every tag channels and lepton categories.
We set a limit on WH production cross section times branching
ratio as a function of Higgs mass. We express our limits as a ratio to the Standard
Model Cross section.
<br><br><br>
<center>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/WHNN_comb/plots/eps/Limit_5.7fb_all.eps"> <img src="10239_WHNN_5.7fb_main_files/Limit_5_002.gif" border="0" width="550"> </a>
<center>
<strong><br>
CDF Preliminary 5.7 fb<sup>-1</sup> <br>
Limits for Combined Tag and Lepton Channels <br>
Rates relative to Standard Model Expectation<br><br>
</strong>
</center>
<table border="1">
<thead>
</thead>
<tbody><tr>
<td> Mass </td> <td> Observed </td><td> Expected </td>
</tr>
<tr><td> 100 </td><td>1.98 </td><td>2.34 </td></tr>
<tr><td> 105 </td><td>3.02 </td><td>2.68 </td></tr>
<tr><td> 110 </td><td>3.74 </td><td>2.94 </td></tr>
<tr><td> 115 </td><td>4.47 </td><td>3.48 </td></tr>
<tr><td> 120 </td><td>5.25 </td><td>4.07 </td></tr>
<tr><td> 125 </td><td>6.26 </td><td>4.99 </td></tr>
<tr><td> 130 </td><td>8.87 </td><td>6.29 </td></tr>
<tr><td> 135 </td><td>12.5 </td><td>8.54 </td></tr>
<tr><td> 140 </td><td>15.8 </td><td>12.2 </td></tr>
<tr><td> 145 </td><td>25.3 </td><td>17.9 </td></tr>
<tr><td> 150 </td><td>44.3 </td><td>28.2 </td></tr>
</tbody></table>
</center>
</td>
</tr>
</tbody>
</table>
<br><br>
<!--
<center><big><big><b>
<a href="../WHNN_comb/WHNN_5.7fb_all.html">- Link to Full Combination result -</a><br><br><br>
-->
<center><b>
<a href="http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/whlnubb_jul10/index.html">- Back to Top page -</a><br><br>
</b><hr>
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Last modified: Mon Aug 31 14:39:35 CDT 2010
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