Kaneda 31May2007 1 Data Evgen from grid mc

Kaneda 31/May/2007 1

Data Evgen: from grid mc 12. 005640. Charybdis. Jimmy. evgen. EVNT. v 12000501_tid 005290 Simulation+digit: 12. 0. 6. 1, recon: 12. 0. 6. 5 ~20 k events (0. 5 fb-1) 005640 "charyb 2 6", # total number of dimensions"charyb 3 5000", # minimum mass "charyb 4 14000", # maximum mass "charyb 5 2", # number of partiles in remant decay "charyb 6 1", # time variation of temperature "charyb 7 1", # grey body factors "charyb 8 1" # kinematic limit 2

Leading Jet (Cone 4 Tower) 1 st 2 nd Fast Full Pt(Ge. V) 3 rd Pt(Ge. V) 4 th Pt(Ge. V) normalized to 1 fb-1 3

Fast (11. 0. 5) (use correction) Arbitrary unit Leading jet Full (12. 0. 6) 1 st 1 fb-1 Full (log scale) Fast 12. 0. 6(no correction? ) Full 12. 0. 6 Pt(Ge. V) 4

Leading Ele, Muo, Pho and Miss. Et Muo Ele Fast Full shoud improve selection? Pt(Ge. V) Missing Et Pho Pt(Ge. V) normalized to 1 fb-1 Pt(Ge. V) 5

Blackhole Mass remaiingn events(1 fb-1) Fast: 13201 Full: 10238 remaiingn events(1 fb-1) Fast: 36006 Full: 36915 MBH(Ge. V) this difference comes from lepton Cut Selection A: High Pt(>200 Ge. V) >3 High Pt Lepton(e or m) > 1 Selection B: High Pt Jets(>500, 400, 300 Ge. V) BH reco: using e, m and g Pt>10 Ge. V, |h|<2. 5 jet(including tau)Pt>20 Ge. V, |h|<2. 5 normalized to 1 fb-1 6

Background: J 1 -J 7 signal remaiingn events(1 fb-1) Fast: 13201 Full: 10238 remaiingn events(1 fb-1) selection A J samples remaiingn events(1 fb-1) Fast: 0 Full: 32 Fast: 36006 Full: 36915 selection B J samples remaiingn events(1 fb-1) Fast: 64767 Full: 61125 7

Trigger events passed selection A(Signal) events passed loose selection(Signal): Jet(Pt>200 Ge. V) > 2 (39428 event from 40000 events remain) each trigger name All J samples are also passed trigger such a Jet 160 8

Triggers for Black Holes ØPrevailing wisdom is the Black Holes easily pass triggers, esp. jet ones ØA preliminary look at trigger efficiencies for BH: L 1 L 2 EF Jet 160 100 100 2 jet 120 - - 99. 96 3 jet 65 99. 97 99. 89 99. 84 4 jet 50 99. 71 99. 53 99. 44 e 60 100 (EM 60) 49. 6 28. 85 g 60 100 (EM 60) 63. 7 41. 28 mu 20 i - 45. 36 40. 75 met 99. 55 (XE 50) 100 (met 10) ØBlack Holes do pass jet triggers – could “AND” all the jet triggers ØElectron/muon/gamma triggers less efficient – search for these at analysis level ØDo we need a dedicated/higher energy jet trigger? James Frost – Cambridge ATLAS 9 CSC BH Note Meeting

Multi Jets (m 1000 sample) Mass(Ge. V)(vector sum of truth particles: hard scatter(from alpgen)) 10

check 1 Te. V-2 Te. V (loose cut) truth mass after selection MBH(Ge. V) loose selection Jet(Pt>200 Ge. V) > 2 ATLFAST require MBH(ATLFAST)>3 Te. V 11

check 1 Te. V-2 Te. V truth mass after selection MBH(Ge. V) Selection B (no events are remaining after Selection A) ATLFAST require MBH(ATLFAST)>3 Te. V 12

Atlfast Jet Eta Phi ? ? ? ? ? 13