CTT for taus

1
CTT for taus

• preliminary studies

2
CTT system

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

3
List of L1 CTT terms

• 1 TTK(1,1) // (number of tracks
• momentum1,2,3,4 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 depositionL,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)

28 TNQ(2,L,4) 29 TDL(SS,1) // (charged
pairSS,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) // (gt1 Isolated
track with pTgt5, 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(lt35) //
(acoplanarity above below 35 sectors) 43
TAC(gt35) 44 TIQ(1) // (If gt1 isolated
track in quadrant i, with pT gt 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)
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)
5
efficiencies

• 54 terms
• QCD pTgt20GeV
• 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
7
W??? ? efficiency vs. QCD efficiency

• terms
• 3, 4, 35, 36,...
• isolated track
• 44 - 47 TIQ(i)
• (If gt1 isolated track
• in quadrant i, with pT gt 5 GeV)

W??? ? efficiency
term number
QCD efficiency
8
3, 4, 35, 36 44-47
3, 4, 35, 36 44-47
3, 4, 6, 7, 11
4, 35, 36 44-47
9
Z ?? ? efficiency vs. QCD efficiency
Z ?? ? efficiency
term number
QCD efficiency
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.