Validation of Reconstruction code

• List of Validation contacts for DPG and POG on Monte Carlo

• List of Validation contacts for Data certification

• Changes to the reconstruction software

• Documented for new features of the reconstruction

Legend:

• : Changes are expected, to be set according to software or condition changes prior to validation
• : Validation done, result is "Not Validated". Report the reasons below
• : Validation done, result is "Ok, Validated"
• : Validation still in progress or results need to be followed up before final green/red light
• : Validation not (yet) done

• The global comparison is available at

Data in 4.4

Reports in this section are based on skims sample reprocessed as part of the release validation samples

Release

Comparison

Tk

Ecal

Hcal

DT

CSC

RPC

Tracking

Electron

Photon

Muon

Jet

MET

BTag

Tau

data in pre1

data in pre2

data in pre3

data in pre4

data in pre5

data in pre6

data in pre7

data in pre8

data in pre9

data in pre10

data in 440

data new alignment

MC in 4.4

Release

Comparison

Tk

Ecal

Hcal

DT

CSC

RPC

Tracking

Electron

Photon

Muon

Jet

MET

BTag

Tau

mc in pre1

mc in pre2

mc in pre3

mc in pre4

mc in pre5

mc in pre6

,

mc in pre7

,

mc in pre8

mc in pre9

mc in pre10

mc in 440

440 details

• 29-Sep-2011: Electron: The increase of charge mis-ID (~15%) observed between pre9 and pre10 is still there and unexplained. Most likely related to a change in the tracking.

440pre10 details

• 19-Sep-2011: Electron (comments from Claude Charlot): A number of variables show significant differences wrt pre9. After some investigations, the main changes can be categorized as coming mainly from: - change in pout, the GSF estimate of the momentum at the GSFtrack end - change in the ECAL reconstructed energy and in the shower shape, mostly in EE (but also possibly slightly in EB) - increased number of reconstructed conversion legs with a significant effect on the charge mis-ID,

440pre9 details

• 08-Sep-2011: Tracking: There is a large increase in fake rate due to addition of tracks from conversions.

440pre6-pre7 details

• 15-Aug-2011: Electron: (C. Charlot) : pre7 vs pre6 everything is OK except the problem with preshower energy, starting with pre6 ; pre7 vs pre7_g494p02 not validated
• 19-Aug-2011: Jets: The slight reduction of PF jet pT in the barrel is due to a change of iterative tracking step names (iter4 and iter5 became iter5 and iter6), which caused all tracks from iter6 to be ignored by PF. No signal hits in the preshower, because of a bug in the sim to digi step. This will be fixed in 440pre8.
• 23-Aug-2011: (CJ) Muon POG: Increase of the rate of events with more than 2 Tk Muons wrt previous releases. Drop in efficiency for tracker tracks with Nhits > 10 (direct effect in the physics analysis). (AP) Still there in 440pre8; it will be supposedly solved in 440pre9, but all this derivates from the ongoing modifications in the tracking, and how does it propagate to the muon reconstruction has to be kept watched out.

440pre1-pre2-pre3-pre4 details

• 18-Jul-2011: (AP) Muon POG validation: there is a L1 trigger inefficiency in the barrel (no DT in L1, only RPC, since 430pre7) for MC, which is not of concern for Reco however, It has been understood, and it will (hopefully) be fixed in the next pre-releases
• 29-Sep-2011: (Comments from C. Charlot for the pre3): Slight shift in the SC energy in EE. Most likely related change in the classification for EE.

template

Release

Comparison

Tk

Ecal

Hcal

DT

CSC

RPC

Tracking

Electron

Photon

Muon

Jet

MET

BTag

Tau

template