Status of Reconstruction in 3.5 and 3.6 D. Lange, J-R Vlimant - - PowerPoint PPT Presentation

Vlimant 1 7/05/09 PVT Meeting

Status of Reconstruction in 3.5 and 3.6

• D. Lange, J-R Vlimant

Vlimant 2 7/05/09 PVT Meeting

Outline

• Report on 3.5 cycle
• Report on 3.6 cycle
• Suggested plan for next reprocessing

Vlimant 3 7/05/09 PVT Meeting

Feature list for 3.5 (1)

• Cleaning of Hcal noise in particle flow (also in 3.4)
• Track Jets are added to the standard reconstruction. (also in 3.4)
• Better DT segment cleaning.
• CSC ME1/1a segments have less ghost.
• Muon identification with calorimeter compatibility is improved.
• Particle flow muons now contain pure tracker muon.
• Better identification of muon from segment compatibility.
• Hcal noisy rechit flaging.
• Better Zero Degree Calorimeter noise reduction.
• ZDC in rechits and digis in reco event content.
• Improved Ecal rechit noise flagging.
• Improved electron and photon identification.
• Castor reconstruction in default reconstruction.
• Castor rechit, tower, clusters, and jet in event content.

https://twiki.cern.ch/twiki/bin/view/CMS/RecoTagSetDigest35X#Executive_Summary

Vlimant 4 7/05/09 PVT Meeting

Feature list for 3.5 (2)

• dEdX is calculated without the pixel hits (also in 3.4)
• Better HO energy association to muon (also in 3.4).
• Better Hcal noise handling in MET (also in 3.4).
• Better beam halo identification (also in 3.4).
• Better Hcal rechit timing at low energy
• Calotower bad hit removal mechanism
• Ecal spike flagging and flagging infrastructure
• Particle flow nuclear interaction reconstruction
• Improved particle flow muon identification
• HF rechit cleaning
• Tuning of HF cleaning
• Updated software to use scaler beam-spot
• Protect all tracking seeding step to 10K seeds

3.5.6 * 3.5.7 * 3.5.8.patch3 *

https://twiki.cern.ch/twiki/bin/view/CMS/RecoTagSetDigest35X#Executive_Summary

(*) not including the many big-fixes in the listing

Vlimant 5 7/05/09 PVT Meeting

Processing with 3.5.8.patch3

• Full reprocessing available

https://twiki.cern.ch/twiki/bin/view/CMS/ReproRequest358patch3

 2010 and 2009 data

• Running on Tier0

 Using the scaler beam-spot (scaler ~ BeamSpot::type()=LHC)  Pixel vertex not using the beam-spot constraint (inconsistent ?)  Conservative tracking seeding regions (~40 cm in z)  Loose PV reconstruction cuts (1 cm z-separation)  Loose photon reconstruction (5 GeV instead of 10 GeV, ...) ➢ Still need completion of validation for high level reconstruction ➢ The two datasets are not as consistent as we would like them to be

due to the beam-spot, but the effect is minor.

Vlimant 6 7/05/09 PVT Meeting

Feature list for 3.6 (1)

https://twiki.cern.ch/twiki/bin/view/CMS/RecoTagSetDigest36X#Executive_Summary

• CSC local reconstruction tuning
• Iterative tracking tuning
• Pixel vertexing clustering reduced to 1mm
• PV reconstruction improved
• Siscone 5 and 7 removed
• Jet-plus-track added
• Jet identification in HF
• HPS tau algorithm added
• Fixed cone tau algorithm removed
• Updated electron identification
• Improved information on soft lepton tagging
• Beam information
• Magnetic field value

Vlimant 7 7/05/09 PVT Meeting

Feature list for 3.6 (2)

https://twiki.cern.ch/twiki/bin/view/CMS/RecoTagSetDigest36X#Executive_Summary

• Added product for bTagging
• Tuning of the HF PMT cleaning
• Updated software to use scaler beam-spot
• Protect all tracking seeding step to 10K seeds
• Pixel error unpacking

3.6.1 *

(*) not including the many big-fixes in the listing

• Possible next things for 3.6 cycle

➔ Bug-fixes ... ➔ Particle flow back port ➔ Pre-shower back port ➔ Tracking seeding adaptive thresholds ➔ Tracker cluster adaptive thresholds ➔ Use channel status in Ecal unpacking ➔ Updated track-jet algo ➔ ...

Vlimant 8 7/05/09 PVT Meeting

Reprocessing with 3.6 (1)

• April 24 :

https://twiki.cern.ch/twiki/bin/view/CMS/ReproRequest360

➢ Configuration include  Adapted PV loose configuration ✗ Did not succeed: 20% failures. ➢ Memory issues with tracking due to an evolution of the third step

• April 28 :

https://twiki.cern.ch/twiki/bin/view/CMS/ReproRequest360Bis

➢ Configuration include  tighter photon reconstruction  electron reconstruction out-of-the-box  Tuning of HF PMT cleaning ✔ Samples exist : 5% failures. ➢ Still memory issue with tracking

Vlimant 9 7/05/09 PVT Meeting

Reprocessing with 3.6 (2)

• May 5 :

https://twiki.cern.ch/twiki/bin/view/CMS/ReproRequest360patch2

➢ Include  Back-plane correction for strip local reconstruction  Update SiStrip Lorentz-Angle conditions  Updated strip gain conditions (not actually used) ✔ Sample exist ➢ Validated for tracking and Hcal ➢ Known issues with Ecal cleaning

Vlimant 10 7/05/09 PVT Meeting

Reprocessing with 3.6

• Next pre-reprocessing : 3.6.1

➢ Include ✔ All addition to 3.6.1(see previous slides) ✔ Validated with previous pre-reprocessing  Back-plane correction for strip local reconstruction  Update SiStrip Lorentz-Angle conditions ✔ Pre-validated  Updated strip gain calibration  Updated tracker alignment  Updated Ecal calibration ✗ To be pre-validated  Updated muon alignment (alignment and APE) ➔ Not enough stat ➔ Would the reprocessing of the muon skim be useful ? ➔ Next valSkim (358patch3) will be enriched in muon  Increase threshold on strip cluster ➔ Not easy to check for memory related crash

Vlimant 11 7/05/09 PVT Meeting

Next Reprocessings

• Plan A: pre-reprocessing with 3.6.1 and new conditions towards

production next week (see previous slide)

➢ Takes ~2 days ✔ Pros: validated by Monday, switching to production next week ✔ Cons: beam-spot payload next week to be validated

• Plan B : full reprocessing with 3.6.1 and no new conditions with

respect to 3.6.0.patch2 reprocessing (?)

➢ Takes ~5 days for 99% of data ➢ Takes a bit more for skims to be made ✔ Pros: get a full dataset with 3.6.1 ✔ Cons: beam-spot payload and conditions to be integrated

Vlimant 12 7/05/09 PVT Meeting

Summary

• 3.5.8.patch3 in production and good datasets available
• 3.6.1 in shape for reprocessing and production