Difference: JetFlavourTagging (21 vs. 22)

Revision 222013-08-06 - DanProtopopescu

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META TOPICPARENT name="WebHome"

Jet Flavour Tagging Howto

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<-- Jet theta angle cut (only the Glasgow NN trainer has this option) -->
24.
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The neural nets are saved as XML files in gnets/ and will be used for flavour tagging (next step). No slcio output is written at this time.
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The neural nets are saved as XML files in gnets/ and will be used for flavour tagging (next step). No slcio output is written at this time. These neural networks can be downloaded from here: gnets.tgz
 

Flavour Tagging

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 For b-tagging, we've compared the plot produced by MakePurityVsEfficiencyRootPlotGla.C and graphs drawn with the data tabulated in PurityEfficiencyOutput.txt, for 1, 2, 3 (corresponding to distinct neural networks) or any number of vertices (which we don't know yet how to interpret):
PEcomparison.png
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Here's the script used to extract the numbers from PurityEfficiencyOutput.txt.
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Here's the script used to extract the numbers from PurityEfficiencyOutput.txt
 

Adding background

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  PEcomparisonBkg.png
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Training the neural nets with eeqq background added

We can train another set of neural nets but adding this time eeqq background to the input. The resulting neural nets (25k signal + 25k background) are here: bnets.tgz.

 

Useful Links

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META FILEATTACHMENT attachment="PEcomparison.png" attr="" comment="B-tagging Purity vs. Efficiency comparison" date="1374664155" name="PEcomparison.png" path="PEcomparison.png" size="12262" stream="PEcomparison.png" tmpFilename="/usr/tmp/CGItemp40207" user="DanProtopopescu" version="2"
META FILEATTACHMENT attachment="PEcomparisonBkg.png" attr="" comment="B-tagging Purity vs. Efficiency comparison (25k eeqq background)" date="1375279055" name="PEcomparisonBkg.png" path="PEcomparisonBkg.png" size="17521" stream="PEcomparisonBkg.png" tmpFilename="/usr/tmp/CGItemp50307" user="DanProtopopescu" version="2"
META FILEATTACHMENT attachment="xtractPEv.txt" attr="" comment="Script used to extract the numbers from PurityEfficiencyOutput.txt" date="1375112805" name="xtractPEv.txt" path="xtractPEv.txt" size="1642" stream="xtractPEv.txt" tmpFilename="/usr/tmp/CGItemp45803" user="DanProtopopescu" version="1"
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META FILEATTACHMENT attachment="gnets.tgz" attr="" comment="Neural nets (Satoru Jet Finder, trained with signal only)" date="1375797750" name="gnets.tgz" path="gnets.tgz" size="11972" stream="gnets.tgz" tmpFilename="/usr/tmp/CGItemp45656" user="DanProtopopescu" version="1"
META FILEATTACHMENT attachment="bnets.tgz" attr="" comment="Neural nets (Satoru Jet Finder, trained with signal + eeqq background)" date="1375800358" name="bnets.tgz" path="bnets.tgz" size="12491" stream="bnets.tgz" tmpFilename="/usr/tmp/CGItemp45654" user="DanProtopopescu" version="1"
 
META TOPICMOVED by="DanProtopopescu" date="1373037183" from="LinearCollider.ZZfusionMain" to="LinearCollider.JetFlavourTagging"
 
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