introduction miha zgubič, summer student scintillating fibre tracker software analysis of...
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![Page 1: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/1.jpg)
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Introduction
• Miha Zgubič, summer student • Scintillating fibre tracker software• Analysis of performance of momentum
reconstruction
![Page 2: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/2.jpg)
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What has been done?
• Compare MC truth to reconstructed values (longitudinal and transverse momentum, pz&pt) – both PR and kalman
• Call the width of Gaussian “resolution”
Resolution plotted as a function of pz or pt. (histograms fitted separately for each MC momentum interval)
noise, muons and pions, kalman filter
![Page 3: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/3.jpg)
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Details
• Lookup table between MC and recon side• Beam: – 10k spills at 200MeV– Emittance of 6.0– Cut on reconstructed pz and pt at 500MeV
• Kalman:– Algorithm 1: station 1 recon momentum used (better
feel for what is going on)– Algorithm 2: recon momentum values averaged over
the trackpoints (better resolutions results)
![Page 4: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/4.jpg)
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Results• Pattern recognition (mu plus, others similar)• Low statistics -> large error bars
![Page 5: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/5.jpg)
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Results• Noise on/off comparison, PR (mu plus)
![Page 6: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/6.jpg)
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Results• Kalman filter (mu plus, averaged)
![Page 7: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/7.jpg)
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Results• Kalman filter (mu plus, station 1)
![Page 8: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/8.jpg)
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Results• Kalman filter (mu plus, station 1)
![Page 9: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/9.jpg)
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Results• Compare kalman and pattern recognition (mu plus, averaged)
![Page 10: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/10.jpg)
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Results• Compare kalman and pattern recognition (mu plus, averaged,
400k spills, different emittance)
![Page 11: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/11.jpg)
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Results• Kalman filter (mu minus)
![Page 12: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/12.jpg)
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Results• Kalman filter (mu minus)
![Page 13: Introduction Miha Zgubič, summer student Scintillating fibre tracker software Analysis of performance of momentum reconstruction 1](https://reader031.vdocuments.net/reader031/viewer/2022032709/56649eb05503460f94bb6497/html5/thumbnails/13.jpg)
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Conclusions
• PR works fine• Noise has little impact on performance• Kalman as good as PR for pz – not better• Worse than PR for pt, and sometimes
produces very large values of pt• Possibly a bug for negative particles?