QqH;H->rr 肖虹 2009.02.19.

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Presentation transcript:

qqH;H->rr 肖虹 2009.02.19

pi0-gamma discrimination： converted photons Signal（VBF） and jets

isolation Photon eta<2.5 Photon pt<30GeV Track isolation Ecal isolation

Converted photon The smallest |e/p-1| of all the selected converted photons

One track Converted photon eoverp Converted photon pt over the closest jet pt Converted photon CEP Converted photon CPP Converted photon R9 Converted photon S9/(S9-S1-S2) DeltaR of Converted photon and the closest SC(except the SC itself)

Converted photon and pi0 discrimination 1 track case 2 track case

Two tracks Converted photon eoverp Converted photon pt over the closest jet pt Converted photon CEP Converted photon CPP Converted photon S9/(S9-S1-S2) DeltaR of Converted photon and the closest SC(except the SC itself) convpho_p_pairsep//(*iPho).pairCotThetaSeparation();

improve conpho_pairmass（not so useful） conpho_eip_x， conpho_eip_y， conpho_eip_z（the position on the surface of ecal） conpho_paireta conpho_distance（the distance between the position on the surface of ecal of the two converted photons） conpho_asymmetry conpho_sRL=SC_E2x5R-SC_E2x5L conpho_sBT=SC_E2x5B-SC_E2x5T conpho_s3x2r=SC_E3x2Ratio

trk2 --- BDT : Rank : Variable : Variable Importance --- BDT : 1 : conpho_closestSC_dR : 4.229e-01 --- BDT : 2 : conpho_et : 7.570e-02 --- BDT : 3 : conpho_ptoverjetpt : 5.810e-02 --- BDT : 4 : conpho_cEP : 5.435e-02 --- BDT : 5 : conpho_s1t : 4.683e-02 --- BDT : 6 : conpho_paireta : 4.324e-02 --- BDT : 7 : conpho_cPP : 4.308e-02 --- BDT : 8 : conpho_cEE : 4.097e-02 --- BDT : 9 : conpho_r9 : 2.644e-02 --- BDT : 10 : conpho_eip_z : 2.305e-02 --- BDT : 11 : conpho_eip_y : 2.091e-02 --- BDT : 12 : conpho_trk34overEt : 1.939e-02 --- BDT : 13 : conpho_eip_x : 1.733e-02 --- BDT : 14 : conpho_sRL : 1.664e-02 --- BDT : 15 : conpho_sBT : 1.561e-02 --- BDT : 16 : conpho_eoverp : 1.535e-02 --- BDT : 17 : conpho_asymmetry : 1.180e-02 --- BDT : 18 : conpho_s3x2r : 1.170e-02 --- BDT : 19 : conpho_pairphi : 1.111e-02 --- BDT : 20 : conpho_distance : 1.091e-02 --- BDT : 21 : conpho_pairsep : 4.895e-03 --- BDT : 22 : conpho_ptoveret : 4.330e-03 --- BDT : 23 : conpho_s9/(conpho_s9-conpho_s1-conpho_s2) : 3.785e-03 --- BDT : 24 : conpho_pairmass : 1.531e-03