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HES-HKS & KaoS meeting

HES-HKS & KaoS meeting. Toshi Gogami 1Mar2013. Welcom e reception of SNP school 2013 @ Tokai. Contents. 2 月 Matrix tuning. 2 月の出来事. 1/20 ~ 2/10 JLab 出張 (Hall-C meeting , Analysis meeting, discussion, analysis, NIM paper (Bucking coil) ) 2/13 ~ 2/20

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HES-HKS & KaoS meeting

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  1. HES-HKS & KaoS meeting Toshi Gogami 1Mar2013 Welcome reception of SNP school 2013 @ Tokai

  2. Contents • 2月 • Matrix tuning

  3. 2月の出来事 • 1/20 ~ 2/10 • JLab 出張 (Hall-C meeting , Analysis meeting, discussion, analysis, NIM paper (Bucking coil) ) • 2/13 ~ 2/20 • SNP school 2013 @ Tokai and Sendai • 2/21 • 6専攻合同シンポジウム • 2/25 ~ 2/27 • 肥山ワークショップ 写真・資料等をwikiにアップします

  4. Analysis flow Initial ROOT file ROOT file Tuning LOOP • Event selection • Fitting  mean+ 2σ etc. • Matrix tuning for selected events • Create new missing mass spectra • Fitting for new MM  Output logs • 2. Create new ROOT file by new matrices • 1. Select better matrices • By width(Λ,Σ,12LB) KRD After Iteration Iteration

  5. 色々ありますが、その中でも主な改造点 Initial ROOT file ROOT file TSpectumでバックグラウンドを差し引いてからFitting Tuning LOOP • Event selection • Fitting  mean+ 2σ etc. • Matrix tuning for selected events • Create new missing mass spectra • Fitting for new MM  Output logs • 2. Create new ROOT file by new matrices • 1. Select better matrices • By width(Λ,Σ,12LB) KRD After Iteration 各標的に応じたある程度厳しめのカットをかけてtuningに必要なイベントだけを残す  ROOT file 軽量化  時間の大幅な短縮 Fitting の結果をログを取ったり、結果を読んだりするのに特化したclassの新規導入 (FitLog.cc , FitLog.hh) Iteration

  6. これまでと何が違うのか • 今回のTuningに入れた反応 • Lambda , Sigma0 , 12LB g.s. • Reference • Lambda , Sigma : PDG values • 12ΛB g.s. : fitting mean • 特に意識した事 • Iteration は少なめに (今回は 5 iteration  30 loop ) • Fittingで得られる中心値はそもそも信用できない。その値でバリバリにtuneをするより、早めに次のloopに入ってある程度ふらふらとした中心値でtuneしてみたかった。 (Fitting毎の中心値のぶれを使って、最適な収束すべき値をscanをする)

  7. Background subtraction

  8. Background subtraction Subtract background

  9. Cut conditions if(hyperflag==110 || hyperflag==111){// Water target if( fabs( ctime + 54.7 ) < 0.8 ){ timecut = true; } else timecut = false; } else{ if( fabs( ctime + 54.45 ) < 0.9 ){ timecut = true; } else timecut = false; } if (//mmflag==1 0.75 < EMom && EMom < 0.93 && // For test (Toshi,2Feb2013) 1.05 < KMom && KMom < 1.25 && // For test (Toshi,2Feb2013) fabs(KXpFP-2.0e-3*KXFP)<.12 //toshi && KYpFP-1.5e-3*KYFP<0.014 //toshi (to cut e,e+ events) && KYpFP-1.5e-3*KYFP>-0.013 //toshi (to cut e,e+ events) && pow(haernpe1+haernpe2+haernpe3,2.0)/(10.0*10.0) + pow(hmsq-0.25,2.0)/(0.25*0.25)<1.0//toshi && pow(hwatnkn1+hwatnkn2-2.0,2.0)/(0.7*0.7) + pow(hmsq-0.25,2.0)/(0.25*0.25)<1.0//toshi for CH2 (pi cut) && fabs(KYpt)<0.08 && -0.2<KXpt && KXpt<0.0 // && fabs(KYpt+0.05)<0.07 && fabs(EXpt)<0.15 && timecut == true //&& fabs(ctime+54.45)<0.7//toshi //&& etrkchi2<5 && htrkchi2<5. //toshi && etrkchi2<20. && htrkchi2<20. //toshi && cutflaglocal==1 )

  10. Analysis time reduction

  11. 12C target Mean : -0.48 FWHM : 0.7MeV 松村さんvalues  • S -11.4±0.01±0.14 • P -0.41±0.01±0.13 Mean : -11.61 FWHM : 0.7MeV JLab E01-011 JLab E05-115

  12. Outlook • Energy loss optimization for polyethylene target • By using 12ΛB g.s. • Raster correction study • X,Y @target vs. MM • GEANT4 • Linearity constrain for each loop • Angular matrix tuning for each loop • SS pattern • Elementary cross section

  13. Backup

  14. CH2 target 標的の厚さ(energy loss)の最適化をしていない為と考えてます。 Λの方だけに大きなシフトがあるのは、g.sのtuneを入れているので、それに近いΛに特に影響が出ているのではないでしょうか。 -274 keV from PDG JLab E05-115 +17 keV from PDG

  15. 7Li target E01-011 : -5.68±0.03±0.25 E01-011と比べると少し浅く今は見える JLab E05-115

  16. 10B target 肥山計算 1st peak  w/o CSB -8.84 , w/ CSB -8.76 2nd peak  w/o CSB -6.33 , w/ CSB -6.21 JLab E05-115

  17. 9Be target JLab E05-115

  18. 9Be targetHall-Aとの比較 JLab E05-115 Hall-A results

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