Update on the HZZ 250 GeV +80/-30 250/fb Analysis for the 5 September 2013 SiD Meeting:
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Analysis:
- divide into 4 jet / 6 jet topologies
- apply preselection depending on topology
- train/apply TMVA's
- validate with cut table
- check remaining backgrounds
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Remaining backgrounds:
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$ sed 's/\./,/g' zzhpassing.dat | awk '{if (NF==18) print $3,$7,$15}' | sort -n | uniq -c | awk '{if (NF==4) aa+=($1*$4);print $1*$4"\t"$0} END{print "Sum of weights = "aa}' | sort -k 1,1 -n
Sum of weights = 762,5
12,5 1 106562 4f_sz 12,500000
12,5 1 106566 4f_sw 12,500000
12,5 1 106572 4f_sz 12,500000
12,5 1 106575 4f_zz 12,500000
12,5 1 106607 2f_z_ 12,500000
25 2 106551 4f_ww 12,500000
25 2 106553 4f_zz 12,500000
25 2 106571 4f_sz 12,500000
25 2 106573 4f_zz 12,500000
37,5 3 106574 4f_zz 12,500000
37,5 3 106578 4f_ww 12,500000
125 10 106608 2f_z_ 12,500000
162,5 13 106576 4f_zz 12,500000
237,5 19 106577 4f_ww 12,500000
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Background contributions for Evis<140:
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[neal@localhost weights]$ sed 's/\./,/g' zzhpassing.dat | awk '{if ($18<140. && NF==18) print $3,$7,$15}' | sort -n | uniq -c | awk '{if (NF==4) aa+=($1*$4);print $1*$4"\t"$0} END{print "Sum of weights = "aa}' | sort -k 1,1 -n Sum of weights = 575 12,5 1 106551 4f_ww 12,500000 12,5 1 106562 4f_sz 12,500000 12,5 1 106566 4f_sw 12,500000 12,5 1 106572 4f_sz 12,500000 12,5 1 106575 4f_zz 12,500000 12,5 1 106607 2f_z_ 12,500000 25 2 106571 4f_sz 12,500000 37,5 3 106578 4f_ww 12,500000 75 6 106608 2f_z_ 12,500000 137,5 11 106576 4f_zz 12,500000 225 18 106577 4f_ww 12,500000 <*************** |
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--- Classifier ( #signal, #backgr.) Optimal-cut S/sqrt(S+B) NSig NBkg EffSig EffBkg --- -------------------------------------------------------------------------------------------------- --- Cuts: (309.89453, 1128865) -0.0050 0 0 0 0 0 --- Likelihood: (309.89453, 1128865) 1.0000 0.378385 299.2573 625191.7 0.9657 0.5538 --- Fisher: (309.89453, 1128865) 0.0088 1.63217 150.0501 8301.587 0.4842 0.007354 --- BDTG: (309.89453, 1128865) -0.9950 1.40141 134.4158 9065.234 0.4337 0.00803 --- BDT: (309.89453, 1128865) 0.0177 3.63521 38.5486 73.90136 0.1244 6.547e-05 --- -------------------------------------------------------------------------------------------------- after raising reco higgs mass cut from 50 GeV to 100 GeV: --- Classifier ( #signal, #backgr.) Optimal-cut S/sqrt(S+B) NSig NBkg EffSig EffBkg --- -------------------------------------------------------------------------------------------------- --- Cuts: (209.30833, 51800) -0.0050 0 0 0 0 0 --- Likelihood: (209.30833, 51800) 0.9105 1.08931 191.9554 30860.64 0.9171 0.5958 --- Fisher: (209.30833, 51800) 0.0176 1.78558 116.8125 4162.945 0.5581 0.08037 --- BDTG: (209.30833, 51800) -0.5098 1.00598 204.0195 40926.24 0.9747 0.7901 --- BDT: (209.30833, 51800) 0.0361 2.92564 72.9263 548.4119 0.3484 0.01059 --- -------------------------------------------------------------------------------------------------- |
Evis<140 GeV and only idrup = 106577 for the background:
Potential tools for reducing the 4f_WW background:
- higher cut on number of charged tracks (unlikely to help S)
- extra cuts but keep any event that has high B-likeness
- redoing n-tuples adding variables for jet combos consistent with W decays (IN PROGRESS)
Note concerning ZZ background: wider cut on acoplanarity should help