Difference between revisions of "BCAL reconstruction 8/24/11"
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* Two reconstruction algorithms in tree: KLOE algorithm=default, "new" algorithm by matt s. | * Two reconstruction algorithms in tree: KLOE algorithm=default, "new" algorithm by matt s. | ||
* Found two issues which lead to poor energy resolution at low E (fixes not checked in yet) | * Found two issues which lead to poor energy resolution at low E (fixes not checked in yet) | ||
| − | * "New" algorithm seems to be doing well | + | * "New" algorithm seems to be doing well for single-photon events |
| − | + | ||
* Further study of b1pi, etc. | * Further study of b1pi, etc. | ||
| + | * Further fine-tuning needed, but maybe should wait until BCAL segmentation finalized? | ||
==BCAL Reconstruction algorithms== | ==BCAL Reconstruction algorithms== | ||
* KLOE algorithm: currently default | * KLOE algorithm: currently default | ||
* GlueX algorithm: by Matt Shepherd [[media:New_bcal_recon.pdf | "New" BCAL Reconstruction Algorithm]] | * GlueX algorithm: by Matt Shepherd [[media:New_bcal_recon.pdf | "New" BCAL Reconstruction Algorithm]] | ||
| − | * GlueX+: Fixed a bug that | + | * GlueX+: Fixed a bug that prevented some DBCALPoint from being considered; lowered energy threshold to seed cluster, minSeed, from 20 MeV to 10 Mev. |
==Single photon event sample== | ==Single photon event sample== | ||
| − | Single photon efficiency | + | ===Single photon efficiency=== |
| + | Exclude all events with tracking hits (include only events where we actually expect to reconstruct a single photon) | ||
| + | |||
| + | KLOE: 99% | ||
| + | |||
| + | GlueX: 98.5% | ||
| + | |||
| + | GlueX+: 99.5% | ||
| + | |||
| + | ===Energy resolution=== | ||
| + | These plots use E_raw, not the corrected/calibrated E. They also exclude events with tracking hits. | ||
| + | |||
| + | KLOE: | ||
| + | |||
| + | [[Image:E res.KLOE.png]] | ||
| − | |||
GlueX: | GlueX: | ||
| Line 27: | Line 40: | ||
[[Image:E res.AFTER4.png]] | [[Image:E res.AFTER4.png]] | ||
| − | Timing resolution: | + | ===Timing resolution=== |
| + | |||
| + | KLOE: | ||
| + | |||
| + | [[Image:T0.KLOE.png]] | ||
| + | |||
| + | |||
| + | GlueX+: | ||
| + | |||
| + | [[Image:T0.AFTER3.png]] | ||
==Single pion event sample== | ==Single pion event sample== | ||
==b1pi event sample== | ==b1pi event sample== | ||
Latest revision as of 17:50, 24 August 2011
Contents
Summary
- BCAL reconstruction seemed to be an obstacle in b1pi events
- Two reconstruction algorithms in tree: KLOE algorithm=default, "new" algorithm by matt s.
- Found two issues which lead to poor energy resolution at low E (fixes not checked in yet)
- "New" algorithm seems to be doing well for single-photon events
- Further study of b1pi, etc.
- Further fine-tuning needed, but maybe should wait until BCAL segmentation finalized?
BCAL Reconstruction algorithms
- KLOE algorithm: currently default
- GlueX algorithm: by Matt Shepherd "New" BCAL Reconstruction Algorithm
- GlueX+: Fixed a bug that prevented some DBCALPoint from being considered; lowered energy threshold to seed cluster, minSeed, from 20 MeV to 10 Mev.
Single photon event sample
Single photon efficiency
Exclude all events with tracking hits (include only events where we actually expect to reconstruct a single photon)
KLOE: 99%
GlueX: 98.5%
GlueX+: 99.5%
Energy resolution
These plots use E_raw, not the corrected/calibrated E. They also exclude events with tracking hits.
KLOE:
GlueX:
GlueX+:
Timing resolution
KLOE:
GlueX+:
