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CTT for taus

Auguste Besson's preliminary studies delve into the CTT (Charged Track Trigger) system for tau particle analysis. The research explores the various subsystems including CFT/CPSax, STT, CFT stereo, CPS stereo, and FPS. It outlines key steps like AFE, MIX, DFE, and discusses essential trigger terms to optimize the detection process. Besson emphasizes the importance of combined approaches in calorimetry and CFT triggering, inviting insights and comments to enhance understanding. This work contributes significantly to the field of particle physics.

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CTT for taus

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  1. CTT for taus preliminary studies Auguste Besson

  2. CTT system • 5 subsystems • - CFT/CPSax • - STT • - CFT stereo • - CPS stereo • - FPS • 6 steps • - AFE • - MIX • - DFE. DFEA • - COL • - BC • - TM Auguste Besson

  3. List of L1 CTT terms 28] =TNQ(2,L,4) 29] =TDL(SS,1) // (charged pair[SS,OS,NS]; momentum) 30] =TDL(SS,3) 31] =TDL(OS,1) 32] =TDL(OS,3) 33] =TDL(NS,1) 34] =TDL(NS,3) 35] =TIS(3) // (>=1 Isolated track with pT>5, 10 GeV) 36] =TIS(4) 37] =TDS(SS) // (charged pair) 38] =TDS(OS) 39] =THT(1) // (Fraction of total CFT doublets hit): 40] =THT(2) // 6/11/02 - the three thresholds are hard-coded in CTTT.cpp to be 5, 10 and 20% 41] =THT(3) 42] =TAC(<35) // (acoplanarity above below 35 sectors) 43] =TAC(>35) 44] =TIQ(1) // (If >=1 isolated track in quadrant i, with pT > 5 GeV) 45] =TIQ(2) 46] =TIQ(3) 47] =TIQ(4) 48] =TOC(1,1) // (number of octants above threshold, threshold in momentum bins) 49] =TOC(2,1) 50] =TOC(1,2) 51] =TOC(2,2) 52] =TTA(1) // (sectors with single cluster tau candidate) 53] =TTA(2) // (sectors with double cluster tau candidate) 54] =TIL // (ioslated track(s) with low home-sector occupancy) 1] =TTK(1,1) // (number of tracks; momentum[1,2,3,4 = 1.5,3,5,10 GeV]) 2] =TTK(1,2) 3] =TTK(1,3) 4] =TTK(1,4) 5] =TTK(2,1) 6] =TTK(2,2) 7] =TTK(2,3) 8] =TTK(2,4) 9] =TEL(L,1) (preshower deposition[L,H]; momentum) 10] =TEL(L,2) 11] =TEL(L,3) 12] =TEL(L,4) 13] =TPQ(1,1) // (number of low pt bin tracks with L deposition, quadrant) 14] =TPQ(1,2) 15] =TPQ(1,3) 16] =TPQ(1,4) 17] =TPQ(2,1) 18] =TPQ(2,2) 19] =TPQ(2,3) 20] =TPQ(2,4) 21] =TNQ(1,L,1) // (number of preshower clusters; quadrant) 22] =TNQ(1,L,2) 23] =TNQ(1,L,3) 24] =TNQ(1,L,4) 25] =TNQ(2,L,1) 26] =TNQ(2,L,2) 27] =TNQ(2,L,3)

  4. trigsim • certification files: /prj_root/843/trigsim_1/cert • p13.03.00 release • p130300_wtaunu.root, p130300_ztautau.root, p130300_qcd.root,p130300_wenu.root. • 7 MC tau types: based on MC decays 1. = e +  2. =  +  3. =  +  (type 1) 4. =  +  + n 0 (type 2) 5. = 3 +  (type 3) 6. = 3 +  + n 0(type 3) 7. = other hadronic Reco types 1.  +  2. 1 trk+ n 0 3. more than 1 trk(3 prongs) Auguste Besson

  5. efficiencies • 54 terms • QCD pT>20GeV • no acceptance cut black W red Z blue/dashed QCD green/dashed We efficiency bbterm number

  6. W : efficiencies by MC tau type • 7 MC types. BBterms eff MCtau type 1 BBterms eff MCtau type 2 BBterms eff MCtau type 3 BBterms eff MCtau type 4 BBterms eff MCtau type 5 BBterms eff MCtau type 6 BBterms eff MCtau type 7 MCtau decay type Auguste Besson

  7. W efficiency vs. QCD efficiency • terms: 3, 4, 35, 36,... • isolated track 44 - 47 =TIQ(i) (If >=1 isolated track in quadrant i, with pT > 5 GeV) W efficiency term number QCD efficiency

  8. eff W-tau nu vs QCD eff MC 3 : W-tau nu vs QCD eff MC 4 : W-tau nu vs QCD eff MC 5 : W-tau nu vs QCD 3, 4, 35, 36 44-47 3, 4, 35, 36 44-47 3, 4, 6, 7, 11 4, 35, 36 44-47 Auguste Besson

  9. Z   efficiency vs. QCD efficiency Z   efficiency term number QCD efficiency Auguste Besson

  10. questions from a non expert • trigger terms : • tried to understand which terms could be interesting • some terms should be ‘’added‘’ • isolated track in quadrant • How combine calorimeter and CFT trigger ? Which level ? • L3tau information ? algorithms ? • Global approach or specific MC tau type ? • inputs/comments welcome and needed. Auguste Besson

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