Work progress J Tao CMSIHEPBeijing weekly meeting 2008

Work progress J. Tao CMS-IHEP/Beijing weekly meeting 2008. 10. 16

1. Gamma candidates ISO with TMVA BDT ¡ Selection: ET>20 Ge. V, |η|<2. 5, 2 highest ET Reco. Photons ¡ Training with all samples: weighted event with 1 fb^-1 ¡ NNiso of Gamma trained in TMVA with (17 inputs) , IBarrel(0, 1), IConverted (0, 1), ¡ New— 18 inputs , Angle with reco. Track (Closest PT>2. 0 Ge. V),

3 new inputs for NNiso

results & comparison

2. Converted Gamma/Pi 0 with TMVA BDT ¡ Selection: ET>20 Ge. V, |η|<2. 5, 2 highest ET Reco. Photons ¡ Training samples: Reco. Photon candidates from gg fusion H signal & Jets background --- Data. Set ¡ 12 inputs Zhangzhen: 20080905 R 9, E/P, Eta ¡ New-12 inputs ¡ PT ranges : : --- Data. Set : --- No. Transform --- No. Transform Signal tree - total number of events : 112789 Background tree - total number of events : 102886 Training signal entries : 50000 Training background entries : 50000 Testing signal entries : 62789 Testing background entries : 52886 : Ranking result (top variable is best ranked) : --------------------------------: Rank : Variable : Separation : --------------------------------: 1 : Photon_c. EE : 2. 409 e-01 : 2 : Photon_c. EP : 1. 856 e-01 : 3 : Photon_c. PP : 1. 732 e-01 : 4 : Photon_S 9 o. S 9 m. S 1 m. S 2 : 9. 675 e-02 Second Max. : 5 : Photon_S 4 o. S 25 : 9. 435 e-02 : 6 : Photon_S 25 m. S 9 o. S 25 : 8. 218 e-02 : 7 : Photon_S 1 o. S 25 : 6. 965 e-02 : 8 : Photon_S 25 m. S 1 o. S 25 : 6. 956 e-02 : 9 : Photon_PT : 5. 838 e-02 : 10 : Photon_R 19 : 4. 558 e-02 : 11 : Photon_Pair. DR : 1. 441 e-02 : 12 : Photon_Pair. PTo. ET : 2. 368 e-04 : --------------------------------

Results

3. Event optimization with TMVA BDT ¡ Selection: ET>20 Ge. V, |η|<2. 5, 2 highest ET Reco. Photons ¡ Training with all samples: weighted event with 1 fb^-1 ¡ No NNiso cut when do the optimization training ¡ Training: Signal (100000/141977) & bkgs (1000000/1894917) ¡ 12 inputs ¡ ¡ ¡ NNiso 1 NNiso 2 Et 1/M Et 2/M |η 1 -η 2| PL of 2 Gamma ¡ ¡ ¡ Max PT of Jets excluding the selected 2 photons Second PT of Jets excluding the selected 2 photons Sum PT of all Jets excluding the selected 2 photons MET + Calo ET Sum PT of the selected 2 photons over sum PT of 2 jets including the selected 2 photons Track Thrust

Results of TMVA

Selections: m. H=120 Ge. V

Results: m. H=120 Ge. V 本底涨落较大

Backgrounds @ 10 fb^-1 Events@10 fb-1: ~11000 evts Function Uncertainty: 0. 6% Stat. err. : 0. 95% Tot. : 1. 2%

Results: m. H=120、130、140、150 Ge. V MC data Expects @ 1 fb^-1 MC data + expects

Significance by evt-counting with 1 category Higgs Mass 5 sigma no 5 sigma sys. with sys 3 sigma no 3 sigma sys with sys 95%exclusion no sys 95% excl. sys 120 7. 6 11. 8 2. 7 4. 2 1. 8 130 9. 1 14. 3 3. 3 5. 1 1. 4 2. 2 140 15. 7 24. 5 5. 6 8. 8 2. 4 3. 8 150 46. 2 72. 6 16. 6 26. 1 7. 1 11. 2 Systemactic error: ¡ Bkg uncertainty (from pdf fit): ~1. 2% ¡ Signal uncertainty: ~20% ¡ When process with sys. error, bkg*(1+1. 2%), sig*(1 -20%) ?

Significance by “pdf” with 1 category From: ¡ Bkg expect ¡ Signal expect ¡ MC data Higgs Mass 5 sigma no 5 sigma sys. with sys 3 sigma no 3 sigma sys with sys 95%exclusion no sys 95% excl. sys 120 6. 9 10. 6 2. 5 3. 8 1. 1 1. 7 130 8. 1 12. 7 2. 9 4. 6 1. 3 2. 1 140 11. 1 17. 3 4. 0 6. 2 1. 8 2. 8 150 33. 0 51. 5 11. 9 18. 5 5. 3 8. 2

4 categories

Backgrounds with 4 categories Expect: The same formula as 1 category, but normalized to the events of each categories

Backgrounds with 6 categories Expect: The same formula as 1 category, but normalized to the events of each categories

Significance by “pdf” with 6 categories ? Higgs Mass 5 sigma no 5 sigma sys. with sys 3 sigma no 3 sigma sys with sys 95%exclusion no sys 95% excl. sys 120 6. 6 10. 4 2. 4 3. 7 1. 1 1. 7 130 7. 7 12. 2 2. 8 4. 4 1. 3 2. 0 140 10. 4 16. 1 3. 7 5. 8 1. 7 2. 7 150 30. 8 48. 0 11. 1 17. 3 5. 0 7. 9 From: ¡ Bkg expect ¡ Signal expect ¡ MC data

Significance by “pdf” with 4 categories Higgs Mass 5 sigma no 3 sigma no 95%exclusion sys no sys 120 6. 6 2. 4 1. 1 Toy Data with 6 categories Toy data: sampling with the expected distribution of signal and background Higgs Mass 5 sigma no 3 sigma no 95%exclusion sys no sys 120 6. 6 2. 4 1. 1 PTDR

Backup

4 opt inputs with different Higgs mass

Unconverted Gamma/Pi 0 with NNcut