Splitting mass in small cells - after debugging
- Akio's study: www.star.bnl.gov/protected/spin/akio/fms2015/showershape.html
- A bug was found which created in recent shower shape update:
I put those values as default (Zhanwen's shape, and 0.8/0.6).
By default, without calling setScaleShowerShape() nor setShowerShapeWithAngle(), one should get the parameters right.This also fixes a bug where it always uses large cell shower shape parameters with Zhanwen's shower shape and
when setMergeSmallToLarge option on. So effectively Zhanwen's shower shape for small cell was at ~x1.3 wider than intended,
and about ~x2 too wider than this study tells me to put (and only for small cells, and only when setMergeSmallToLarge is on).
This was causing massive pulls of photons towards center.- Akio, Apr. 16, 2019
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- Tested same QA codes after running a Scheduler with debugged libraries (StEvent, StFmsHitMaker, StFmsPointMaker, and StFmsUtil/)
- For the better comparison same type of figures "before" debugging also will be shown
- Only detId 10 (Small cell north) will be shown: detId 11 is NOT very different
1. Mass vs. pair E, separated by Zgg in stepwidth of 0.1
1-a. Before debug (reported before)
1-b. After debug
2. Mass vs. pair E, incremental Zgg in stepwidth of 0.1
2-1. Before debug
2-2. After debug
3. Distance between points, separated by Zgg in stepwidth of 0.1
3-1. Before debug
3-2. After debug
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- Tested points' XY distribution if those "grid" like structure still exists
- Weak concentration still exists, but much eased. I think it's reasonable enough
4. Points' XY distribution
4-a-1. All, before debug
4-a-2. All, after debug
4-b-1. Large cells, before debug
4-b-2. Large cells, after debug
4-c-1. Small cells, before debug
4-c-2. Small cells, after debug
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5. Mass vs. Zgg, separated by pair E in stepwidth of 10
5-1. Before debug
5-2. After debug
* 6. Mass vs. Zgg, separated by pair E in stepwidth of 10, for detId = 8
6-1. Before debug
6-2. After debug
- ckimstar's blog
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