I looked at the file :

const Char_t *Out="/eliza15/star/starprod/embedding/2007ProductionMinBias/D0_160_1234306453/P08ic.SL08f/2007/125/st_physics_8125012_raw_1040054.minimc.root";

and print some variables for the MatchedPairs branch :

• number of Silicon hits and number of silicon hits for the fitted tracks
• pTMc, pTRc, average quality

According to the embedding request , there is 5% of multiplicity D0/event

In this file there is 15 events and 25592 tracks (mMatchedPairs entries)

Example of 1 event :

 Number of matchedPairs = 957
 Matched pair : #SSD = 1 # SVT = 3                                         <--- Number of si hits possible
 geant Id = 8 parent geant = 37
 Matched pair Fit: #SSD = 1 # SVT = 1                                      <--- Number of si hits fitted
 pT Mc = 1.52091 pR Rc = 1.4948 Avg Quality = 99.0244
 Matched pair : #SSD = 1 # SVT = 2
 geant Id = 8 parent geant = 37
 Matched pair Fit: #SSD = 0 # SVT = 0
 pT Mc = 1.06499 pR Rc = 1.07203 Avg Quality = 100
 Matched pair : #SSD = 1 # SVT = 2
 geant Id = 12 parent geant = 37
 Matched pair Fit: #SSD = 0 # SVT = 0
 pT Mc = 1.14502 pR Rc = 1.14123 Avg Quality = 99.871
 Matched pair : #SSD = 1 # SVT = 0
 geant Id = 8 parent geant = 37
 Matched pair Fit: #SSD = 0 # SVT = 0
 pT Mc = 4.02073 pR Rc = 3.88327 Avg Quality = 99.9333
 Matched pair : #SSD = 0 # SVT = 0
 geant Id = 12 parent geant = 37
 Matched pair Fit: #SSD = 0 # SVT = 0
 pT Mc = 0.754754 pR Rc = 0.749339 Avg Quality = 100
 

comments : 

1. tracks from D0 have SSD and SVT hits

2. but the remaining tracks after fitting is very low

For this file, there is at the 147 tracks with SSD>0 || SVT>0 (condition is mMatchedPairs.mPtMc>0 && mMatchedPairs.mPtPr>0)

Fig1 : # of possible SSD hits (Y-axis) vs # of SSD hits fitted (X-axis)

Fig2 : # of possible SVT hits (Y-axis) vs # of SVT hits fitted (X-axis)

From Fig2, we see that most of the matched tracks have 1 SVT hit fitted.

### update 07/12 ####

Files I've looked are :

/eliza15/star/starprod/embedding/2007ProductionMinBias/D0_220_1234306453/P08ic.SL08f/2007/125/*.minimc.root

(supposed to be with corrected SVT hits)

• Silicon Hits with loose cuts

Loose cuts are :

1. abs(mMatchedPairs.mEtaMc)<=1
2. mMatchedPairs.mFitPts>=10
3. mMatchedPairs.mAvgQuality>0
4. mMatchedPairs.mPtPr>0.1
5. mMatchedPairs.mPtMc>0.1

• tight cuts

tight cuts are :

1. abs(mMatchedPairs.mEtaMc)<=0.5
2. mMatchedPairs.mFitPts>=25
3. mMatchedPairs.mAvgQuality>90
4. mMatchedPairs.mPtPr>0.1
5. mMatchedPairs.mPtMc>0.1

comments :

• the number of SSD hits does not change a lot from previous sample
• but we see that there is more SVT hits fitted (x-axis) than the previous sample

With another files

/eliza15/star/starprod/embedding/2007ProductionMinBias/D0_230_1234306453/P08ic.SL08f/2007/125/*.minimc.root

(for the loose cuts)

• pT resolution (pTPr - ptMc) for different cuts :

/eliza15/star/starprod/embedding/2007ProductionMinBias/D0_230_1234306453/P08ic.SL08f/2007/125/*.minimc.root

1. top left         : mMatchedPairs.mPtMc>.1 && mMatchedPairs.mPtPr>0.1
2. top right       : mMatchedPairs.mPtMc>.1 && mMatchedPairs.mPtPr>0.1 && abs(mMatchedPairs.mEtaMc)<=0.5
3. bottom left   : mMatchedPairs.mPtMc>.1 && mMatchedPairs.mPtPr>0.1 && abs(mMatchedPairs.mEtaMc)<=0.5 && mMatchedPairs.mFitPts>=25
4. bottom right : mMatchedPairs.mPtMc>.1 && mMatchedPairs.mPtPr>0.1 && abs(mMatchedPairs.mEtaMc)<=0.5 && mMatchedPairs.mFitPts>=25 && mMatchedPairs.mAvgQuality>90

Open symbols : rms of the distribution

• eta distribution

1. for all tracks

     2. for SVT =0 (eta MC)

    3. for SSD =0 (eta MC)

• Geant Id

Most of the tracks have good pid (parent geant =37 and geant id = 8,12)

 8/16 : embedding meeting

Look at log files from embedding test : slide