Task #897
openCharge normalized DVCS yield analysis
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Description
I'll post all the past slides here.
Files
Updated by Yaopeng Zhang 5 months ago
- File Updates_Nov12.pdf Updates_Nov12.pdf added
No TL live time and trigger efficiency correction applied
Updated by Yaopeng Zhang 5 months ago
- File Updates_Nov16.pdf Updates_Nov16.pdf added
Applied TL live time and trigger efficiency correction
Updated by Yaopeng Zhang 5 months ago
- File Updates_Nov19.pdf added
Compared the results with 1.5GeV threshold and corrected the random events subtraction with pre-scale factor
Updated by Yaopeng Zhang 5 months ago
- File Updates_Nov29.pdf added
It turns out that the previous big negative slope was due to the wrong value of branch "NPS.cal.nclust" in the root file which means I didn't loop all the clusters for each event.
I did some test and found that when the first 0 appears in the "NPS.cal.clusE" array, all the rest values in that array are 0. This allows me to calculate the real cluster number myself easily.
I used the real cluster number in my analysis script and finally got a much better result than before. The fluctuation of the charge normalized DVCS yield is only around 5% now (Emax algorithm).
I also tried the "only 1 cluster > 1.2" algorithm which means I only consider the one good cluster event as a DVCS event. The fluctuation of the charge normalized DVCS yield is also around 5% if we ignore the strange points at low beam current.
Updated by Yaopeng Zhang 5 months ago
- File Updates_Dec01.pdf Updates_Dec01.pdf added
1. Analyzed run 3104 and 3105 (one photon trigger runs), the slope is 0.0029. Previous result for KinC_x50_4 is -0.0074.
2. With the help of Mark, we found that the "NPS.cal.nclust" is correct. But for some events, there could be more none-zero values in the clusE and clusT array than "NPS.cal.nclust".
Those unexpected none-zero values are absolutely the same as previous event (but it happens randomly).
3. Previously I thought the "NPS.cal.nclust" branch is wrong so I used all none-zero values for each event to do the analysis again. Surprisingly, I got a much better result than before.
The fluctuation of the charge normalized DVCS yield is only around 5% (Emax algorithm). And the slope is very small (0.0007).
I'm a little confused why double counting some clusters can help improve the result and what it implies.
Updated by Yaopeng Zhang 5 months ago
- Subject changed from Charge normalized DVCS events analysis to Charge normalized DVCS yield analysis
Updated by Yaopeng Zhang 5 months ago
- File Updates_Nov26.pdf Updates_Nov26.pdf added
Updated by Yaopeng Zhang 5 months ago
- File Updates_Dec03.pdf Updates_Dec03.pdf added
Updates for the analysis meeting on Dec 04
Updated by Yaopeng Zhang 5 months ago
- File Updates_Dec06.pdf Updates_Dec06.pdf added
This time we have much better results for pi0 and dvcs charge normalized yield.
But it's a little strange why it's not a flat distribution for LH2 when the energy threshold is 2.0 GeV. It implies there is still some thing we are not that clear. I'll try to figure it out.
Updated by Alexandre Camsonne 5 months ago
- Status changed from New to In Progress
Updated by Yaopeng Zhang 5 months ago
- File Updates_Dec10.pdf Updates_Dec10.pdf added
Added one more page compared with "Updates_Dec06.pdf". The new page shows the gain loss effect on the charge normalized DVCS yield.
Updated by Yaopeng Zhang 4 months ago
- File Updates_Dec18.pdf added
Charge normalized yield result from Kinc_x50_2 to Kinc_x50_1'
Some of those kinematics showed a decreasing yield with the run number.
Updated by Yaopeng Zhang 4 months ago
- File Updates_Dec18.pdf Updates_Dec18.pdf added
Charge normalized yield results from Kinc_x50_2 to Kinc_x50_1'
Some of those kinematics showed a decreasing yield with the run number.
Updated by Yaopeng Zhang 3 months ago
- File Updates_2024-02-04.pdf Updates_2024-02-04.pdf added
Checked the new runs for Kinc_x36_5'
Updated by Yaopeng Zhang 2 months ago
- File Updates_2024-02-11.pdf Updates_2024-02-11.pdf added
New yield results for Kinc_x36_5' with new calibration coefficients
Updated by Yaopeng Zhang 2 months ago
- File Updates_2024-02-19.pdf Updates_2024-02-19.pdf added
Updated by Yaopeng Zhang about 2 months ago
- File Updates_2024-03-03.pdf Updates_2024-03-03.pdf added
Results for KinC_x60_4a and KinC_x60_4b with EDTM live time correction
Updated by Alexandre Camsonne about 2 months ago
Kin 60_4a
4 sets of calibration generated
Replayed for whole kinematics
will generate DVCS and pi0 yields including a missing mass cut to see if the slope will be better
Updated by Yaopeng Zhang about 1 month ago
- File Updates_2024-03-14.pdf Updates_2024-03-14.pdf added
Calibrated KinC_x60_4a results and slope table which indicates NPS calo dead-time
Updated by Yaopeng Zhang about 1 month ago
- File Updates_2024-03-25.pdf Updates_2024-03-25.pdf added
LD2 and LH2 runs in the same yield plot
Updated by Yaopeng Zhang 18 days ago
- File Updates_2024-04-08.pdf Updates_2024-04-08.pdf added
Applied tighter beam current cut but no stable condition was required
Updated by Yaopeng Zhang 17 days ago
- File Updates_2024-04-11.pdf Updates_2024-04-11.pdf added
Applied tighter beam current cut and also stable condition was required (abandon +/- 3 scaler readouts around beam trips)