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Task #897

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Charge normalized DVCS yield analysis

Added by Yaopeng Zhang 3 months ago. Updated 2 days ago.

Status:
In Progress
Priority:
High
Assignee:
Start date:
02/01/2024
Due date:
% Done:

0%

Estimated time:
(Total: 0.00 h)

Description

I'll post all the past slides here.


Files

Updates_Nov12.pdf (251 KB) Updates_Nov12.pdf No TL live time and trigger efficiency correction applied Yaopeng Zhang, 11/20/2023 11:12 AM
Updates_Nov16.pdf (315 KB) Updates_Nov16.pdf Applied TL live time and trigger efficiency correction Yaopeng Zhang, 11/20/2023 11:13 AM
Updates_Dec01.pdf (547 KB) Updates_Dec01.pdf Result for one photon trigger runs Yaopeng Zhang, 11/30/2023 09:49 PM
Updates_Nov26.pdf (352 KB) Updates_Nov26.pdf Comparison between different clusT windows Yaopeng Zhang, 12/01/2023 12:12 PM
Updates_Dec03.pdf (875 KB) Updates_Dec03.pdf Updates for the analysis meeting on Dec 04 Yaopeng Zhang, 12/04/2023 10:59 AM
Updates_Dec06.pdf (456 KB) Updates_Dec06.pdf Better results for pi0 and dvcs charge normalized yield Yaopeng Zhang, 12/07/2023 01:05 PM
Updates_Dec10.pdf (544 KB) Updates_Dec10.pdf Gain loss effect on the charge normalized DVCS yield Yaopeng Zhang, 12/11/2023 08:25 PM
Updates_Dec18.pdf (1.78 MB) Updates_Dec18.pdf Charge normalized yield results from Kinc_x50_2 to Kinc_x50_1' Yaopeng Zhang, 12/18/2023 11:19 AM
Updates_2024-02-04.pdf (308 KB) Updates_2024-02-04.pdf Checked the new runs for Kinc_x36_5' Yaopeng Zhang, 02/05/2024 10:56 AM
Updates_2024-02-11.pdf (213 KB) Updates_2024-02-11.pdf New yield results for Kinc_x36_5' with new calibration coefficients Yaopeng Zhang, 02/12/2024 10:17 AM
Updates_2024-02-19.pdf (246 KB) Updates_2024-02-19.pdf Results for KinC_x60_4a and KinC_x60_4b Yaopeng Zhang, 02/18/2024 11:42 PM

Subtasks 1 (1 open0 closed)

Task #927: Need new calibration coefficientIn ProgressHao Huang02/01/2024

Actions
Actions #1

Updated by Yaopeng Zhang 3 months ago

No TL live time and trigger efficiency correction applied

Actions #2

Updated by Yaopeng Zhang 3 months ago

Applied TL live time and trigger efficiency correction

Actions #3

Updated by Yaopeng Zhang 3 months ago

  • File Updates_Nov19.pdf added

Compared the results with 1.5GeV threshold and corrected the random events subtraction with pre-scale factor

Actions #4

Updated by Casey Morean 3 months ago

  • Priority changed from Normal to High
Actions #5

Updated by Yaopeng Zhang 3 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.

Actions #6

Updated by Yaopeng Zhang 3 months ago

  • File deleted (Updates_Nov29.pdf)
Actions #7

Updated by Yaopeng Zhang 3 months ago

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.

Actions #8

Updated by Yaopeng Zhang 3 months ago

  • Subject changed from Charge normalized DVCS events analysis to Charge normalized DVCS yield analysis
Actions #9

Updated by Yaopeng Zhang 3 months ago

  • File deleted (Updates_Nov19.pdf)
Actions #11

Updated by Yaopeng Zhang 3 months ago

  • File Updates_Dec03.pdf added
Actions #12

Updated by Yaopeng Zhang 3 months ago

  • File deleted (Updates_Dec03.pdf)
Actions #13

Updated by Yaopeng Zhang 3 months ago

Updates for the analysis meeting on Dec 04

Actions #14

Updated by Yaopeng Zhang 3 months ago

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.

Actions #15

Updated by Alexandre Camsonne 2 months ago

  • Status changed from New to In Progress
Actions #16

Updated by Yaopeng Zhang 2 months ago

Added one more page compared with "Updates_Dec06.pdf". The new page shows the gain loss effect on the charge normalized DVCS yield.

Actions #17

Updated by Yaopeng Zhang 2 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.

Actions #18

Updated by Yaopeng Zhang 2 months ago

Charge normalized yield results from Kinc_x50_2 to Kinc_x50_1'

Some of those kinematics showed a decreasing yield with the run number.

Actions #19

Updated by Yaopeng Zhang 2 months ago

  • File deleted (Updates_Dec18.pdf)
Actions #20

Updated by Yaopeng Zhang 15 days ago

Checked the new runs for Kinc_x36_5'

Actions #21

Updated by Yaopeng Zhang 8 days ago

New yield results for Kinc_x36_5' with new calibration coefficients

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