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Analysis of Chi-Square Distribution and Multiplicity in 52Cr Experiments

This document presents findings from the HES and HKS experiments focusing on the chi-square distribution, event number ratio, and multiplicity for the 52Cr target. Key comparisons between HES and HKS tracking performance are highlighted, indicating that HES tracking is superior. The analysis further explores multiplicity versus chi-square, including multiple cuts to enhance the quality of single-hit selections. A detailed review of linear algebra applications, event tracking codes, and the significance of results for various targets, including CH2 and H2O, is also included, alongside recommendations for future work.

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Analysis of Chi-Square Distribution and Multiplicity in 52Cr Experiments

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  1. HES HKS meeting 6/1/2010 T.Gogami

  2. contents • chi-square (rev.415) • number of event ratio • multiplicity vs. chi-square • 52Cr • CH2 target • multiplicity vs. MM for 52Cr target • / • read tracking code • linear algebra • 部屋の整理

  3. rev.415 Chi square distribution HES , CH2 HKS , CH2 • Scan • htrkchi2<X , etrkchi2<300 • htrkchi2<300 , etrkchi2<X HKS , 52Cr HES , 52Cr

  4. Event num. ratio χ2 distribution is wide for HKS!  HKS tracking is not good . (HES tracking is better . ) bound- and QF- Λ

  5. multiplicity vs. chi-square 52Cr rev.415 χ2 cut  select single hit

  6. multiplicity vs. chi-square CH2 rev.415 χ2 cut  select single hit

  7. Multiplicity vs. Missing mass for 52Cr target selected kaon

  8. summary and to do • summary • chi-square (rev.415) • number of event ratio  HES tracking is better than HKS. • multiplicity vs. chi-square χ2 cut -> single hits can be selected • multiplicity vs. MM for 52Cr target • to do • H2O target (chi-square , multiplicity) • read tracking code • golden data to analyzer [d.doi] • Fortran - c++

  9. END

  10. backup

  11. S/Nhtrkchi2 < X , etrkchi2<300 NReal CH2 NAcc. NAcc. definition

  12. S/Nhtrkchi2 < 300 , etrkchi2<X NReal CH2 NAcc. NAcc. definition

  13. Multiplicity vs. Missing mass for CH2 Σ0 Λ Σ0 Λ contour plot

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