Difference: TrackingVectorHits (1 vs. 5)

Revision 52019-09-05 - DogukanKizbay

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META TOPICPARENT name="SWGuideContributors"

Tracking Physics Object Vector Hits

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  TODO: Decribe the performance

Recipe (In progress)

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connect lxplus7.cern.ch
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# Tested on lxplus7
  export SCRAM_ARCH=slc7_amd64_gcc700 cmsrel CMSSW_11_0_0_pre5 cd CMSSW_11_0_0_pre5/src/ cmsenv git cms-merge-topic JanFSchulte:VectorHits_1100pre5
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scram b -j4
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scram b -j4 # this will take a while
 
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runTheMatrix.py -l 29034.1 -ne -w upgrade
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runTheMatrix.py -l 20434.1 -ne -w upgrade
  mkdir VectorHits cd VectorHits/ voms-proxy-init -voms cms xrdcp root://cms-xrd-global.cern.ch//store/relval/CMSSW_10_6_0/RelValTTbar_14TeV/GEN-SIM-DIGI-RAW/106X_upgrade2023_realistic_v2_2023D41noPU-v1/10000/3CAB550F-8CD2-3542-9BDA-C667D193A6CB.root ./step3_DIGI2RAW.root
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cmsDriver.py step3 --conditions auto:phase2_realistic -n 10 --era Phase2C8_timing_layer_bar --eventcontent RECOSIM,DQM --runUnscheduled -s RAW2DIGI,RECO:reconstruction_trackingOnly,VALIDATION:@trackingOnlyValidation,DQM:@trackingOnlyDQM --datatier GEN-SIM-RECO,DQMIO --geometry Extended2023D41

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cmsDriver.py step3 --conditions auto:phase2_realistic -n 10 --era Phase2C8_timing_layer_bar --eventcontent RECOSIM,DQM --runUnscheduled -s RAW2DIGI,RECO:reconstruction_trackingOnly,VALIDATION:@trackingOnlyValidation,DQM:@trackingOnlyDQM --datatier GEN-SIM-RECO,DQMIO --geometry Extended2026D41
 

Samples without pileup, reference (D41) geometry

DAS query: dataset=/RelValTTbar_14TeV/CMSSW_10_6_0-106X_upgrade2023_realistic_v2_2023D41noPU-v1/GEN-SIM-DIGI-RAW

Revision 42019-09-05 - DogukanKizbay

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META TOPICPARENT name="SWGuideContributors"

Tracking Physics Object Vector Hits

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  export SCRAM_ARCH=slc7_amd64_gcc700 cmsrel CMSSW_11_0_0_pre5
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cd CMSSW_10_11_0_0_pre5/src/
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cd CMSSW_11_0_0_pre5/src/
 cmsenv git cms-merge-topic JanFSchulte:VectorHits_1100pre5 scram b -j4

Revision 32019-09-04 - DogukanKizbay

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META TOPICPARENT name="SWGuideContributors"

Tracking Physics Object Vector Hits

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connect lxplus7.cern.ch

export SCRAM_ARCH=slc7_amd64_gcc700
Changed:
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cmsrel CMSSW_10_6_0 cd CMSSW_10_6_0/src/
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cmsrel CMSSW_11_0_0_pre5 cd CMSSW_10_11_0_0_pre5/src/
 cmsenv
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git cms-merge-topic JanFSchulte:930pre3_VectorHits_PixelLess_final
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git cms-merge-topic JanFSchulte:VectorHits_1100pre5
 scram b -j4

runTheMatrix.py -l 29034.1 -ne -w upgrade

Revision 22019-08-24 - DogukanKizbay

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META TOPICPARENT name="SWGuideContributors"

Tracking Physics Object Vector Hits

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Introduction

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TODO: Describe Vector Hits
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A new type of hits so-called vector hits were introduced with the aim of answering the question whether they bring tangible benefits in track reconstruction at the HL-LHC.
 
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TODO: Describe Point of the code
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Vector hits (~offline stubs) are short track segments reconstructed from two clusters in stacked sensors upper and lower clusters. A vector hit contains position and direction information also solve the pattern recognition problem in the tracker.
 
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TODO: Decribe the performance
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A vector hit can be mathematically represented in the local system of reference by a 4 component vector:
 <br />(x, y, dx/dz, dy/dz)

where x and y are the most and least precise coordinate, respectively, while dx/dz and dy/dz are the respective direction components on the two axes. The covariance matrix associated to the vector hit is symmetric.

vectorhit1.jpg

vectorhit2.jpg

The algorithm used to build vector hits starts from all the clusters found in the event that belong to the lower and the upper sub-module of a particular stack module. The x- and y-coordinate of the vector hit and the corresponding errors are the ones associated to the lower cluster. The dx/dz and dy/dz are computed by a linear fit using the positions of the lower and upper clusters in the x−z and y −z plane. The linear fit gives also a first estimate of the variances of the direction parameters and their covariance with respect to the local position.

 
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The existing tracking algorithms we adapted to the new tracker and the performance of tracking and vertexing for different event types and detector geometries were evaluated. They were found to be similar to the current ones despite the harsher pileup conditions at HL-LHC.

KF was extended to make use of the full information contained in the vector hits, and a new iteration in the Phase-2 tracking, in which seeds are built using only the vector hits was added.

The results show a reduction of about an order of magnitude of the number of mis-identified tracks for high pileup environments and a significant improvement in the reconstruction of tracks coming from displaced vertices.

for more information Erica Brondolin Thesis

TODO: Decribe the performance

 

Recipe (In progress)

connect lxplus7.cern.ch
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 cmsrel CMSSW_10_6_0 cd CMSSW_10_6_0/src/ cmsenv
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git cms-merge-topic JanFSchulte:930pre3_VectorHits_PixelLess_final scram b -j4
  runTheMatrix.py -l 29034.1 -ne -w upgrade
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  DAS query: dataset=/RelValTTbar_14TeV/CMSSW_10_6_0-106X_upgrade2023_realistic_v2_2023D41noPU-v1/GEN-SIM-DIGI-RAW
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META FILEATTACHMENT attachment="vectorhit1.jpg" attr="" comment="" date="1566679685" name="vectorhit1.jpg" path="vectorhit1.jpg" size="24100" user="dkizbay" version="1"
META FILEATTACHMENT attachment="vectorhit2.jpg" attr="" comment="" date="1566679685" name="vectorhit2.jpg" path="vectorhit2.jpg" size="18763" user="dkizbay" version="1"

Revision 12019-08-09 - DogukanKizbay

Line: 1 to 1
Added:
>
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META TOPICPARENT name="SWGuideContributors"

Tracking Physics Object Vector Hits

Introduction

TODO: Describe Vector Hits

TODO: Describe Point of the code

TODO: Decribe the performance

Recipe (In progress)

connect lxplus7.cern.ch

export SCRAM_ARCH=slc7_amd64_gcc700
cmsrel CMSSW_10_6_0
cd CMSSW_10_6_0/src/
cmsenv

runTheMatrix.py -l 29034.1 -ne -w upgrade 

mkdir VectorHits
cd VectorHits/
voms-proxy-init -voms cms
xrdcp root://cms-xrd-global.cern.ch//store/relval/CMSSW_10_6_0/RelValTTbar_14TeV/GEN-SIM-DIGI-RAW/106X_upgrade2023_realistic_v2_2023D41noPU-v1/10000/3CAB550F-8CD2-3542-9BDA-C667D193A6CB.root ./step3_DIGI2RAW.root

cmsDriver.py step3  --conditions auto:phase2_realistic -n 10 --era Phase2C8_timing_layer_bar --eventcontent RECOSIM,DQM --runUnscheduled  -s RAW2DIGI,RECO:reconstruction_trackingOnly,VALIDATION:@trackingOnlyValidation,DQM:@trackingOnlyDQM --datatier GEN-SIM-RECO,DQMIO --geometry Extended2023D41

Samples without pileup, reference (D41) geometry

DAS query: dataset=/RelValTTbar_14TeV/CMSSW_10_6_0-106X_upgrade2023_realistic_v2_2023D41noPU-v1/GEN-SIM-DIGI-RAW


 
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