* Inner positions X vs Y:

Raw events

• From the associated Raw Digi in the reco'd sample

• Basic plots on raw tracks:

Pt Raw CSCTF vs Pt Reco'd muons

In order to match the information coming from the CSCTF to the correspondent reconstructed track, I have been using the phi and eta coming from the rechits. Given a reco'd track, the information of the rechit closest to the key station and key layer is accessed and used as phi and eta for the muon. For the CSCTF track the phi and eta coming out from the LUT are used. As observed in plot phiRaw-66714.png the phi variable ranges from 0->75 degrees and it is defined inside a sector. To convert the CSCTF phi, PhiTF, in a range from [0,2Pi], I used the following formula:

fmod( PhiTF + ((sector-1)*PI/3) + (PI/12), 2*PI)

By requesting for the analysis only tracks which are reco'd with a 0.9 < eta < 2.4, this is the typical output I get:

    --------------------------------------------------------------------------------

    *** Run 66714 Evt 3782283

   - PtReco: 5.6432      EtaReco:  1.0095     PhiReco: -0.4967
                         EtaRCH :  1.1738     PhiRCH :  6.1918

   # PtRaw : 140.0000    EtaRaw :  0.9750    PhiRaw :  4.4942
   # PtRaw : 140.0000    EtaRaw :  1.1750    PhiRaw :  6.1523
   # PtRaw : 140.0000    EtaRaw : -0.9750    PhiRaw :  2.3998
   # PtRaw : 140.0000    EtaRaw : -1.0250    PhiRaw :  2.6616
   # PtRaw : 140.0000    EtaRaw : -1.0250    PhiRaw :  2.7489

   --------------------------------------------------------------------------------

   *** Run 66714 Evt 3922998

   - PtReco:16.0627     EtaReco: -1.0907    PhiReco: -2.2169
                        EtaRCH : -1.1086    PhiRCH :  4.2180
 
   # PtRaw :  14.0000    EtaRaw :  1.0750    PhiRaw :  0.6545
   # PtRaw : 140.0000    EtaRaw : -1.1250    PhiRaw :  4.4506
   
   --------------------------------------------------------------------------------

   *** Run 66714 Evt 5545060
 
   - PtReco: 5.7985     EtaReco: -0.9170     PhiReco:  0.7049
                        EtaRCH : -1.0371     PhiRCH :  1.2198
 
   # PtRaw : 140.0000    EtaRaw : -1.0250    PhiRaw :  1.4835
 
  --------------------------------------------------------------------------------
  
  

From this example, we see that for a given reco'd track there could be one (mostly from my empirical observation) or more CSC raw tracks built. Clearly only one of the CSCTF tracks match the reco'd rechit information. In order to define the Eta and Phi cuts to use in the identification of the correct track, I produced the following plots, DeltaEta and DeltaPhi: for each reco'd track, I compute the phi and eta difference for all the raw tracks in the event.

• Delta Eta and Delta Phi:

Observations:

1. The peak centered at 0 come from the matching between the reco'd track and correct CSCTF track ("signal").
2. The spread bumps on the sides comes from the matching between the reco'd track and the wrong CSCTF tracks ("background")
3. Eta has a better resolution than Phi. Possible issues with ME 1/1. Producing the scatter plot of Delta Phi vs Eta (from CSCTF) the resolution of Delta Phi worsen as the eta increases.

• Delta Phi vs Eta (from CSCTF):

As windows for the selection of the final events I used [EtaRechit-EtaTF < 0.5] and [PhiRechit-PhiTF < 0.5]. With this selection applied, I produced the scatter plot, Pt Raw (from the CSCTF) Vs Pt Reco'd muon. To better visualize the outcome, the profile along the Pt Raw is also depicted (right plot).

* Pt comparison:

Observation:

- While the definition of Pt LUT validation has not been established yet, one can observe, in particular from the profile plot, that the CSCTF seems to pick the "correct" transverse momentum range, i.e. for small value of reco'd muon Pt, the CSCTF assigns small value of Pt in the correct range for the correspondent raw track. Remember that the output of the CSCTF for Pt (as well as for Eta and Phi) is binned and not a continuous distribution.

Remark:

- No additional cuts on the quality of the raw track or on direction of the track have been applied.

-- GianPieroDiGiovanni - 10 Nov 2008