Data taken with atlas detector in 2011-2012 e 10-ATLAS Online Luminosity =8N 2010 pp s=7 TeV ATLAS 2011 pp vs=7 TeV 2012 pp Vs=8 Tev 86 yan yu od yan Aof Ju od yan Aof jo oc Month in Year Month in 2010 Month in 2011 Month in 2012 In 2011-2012, LHC operated successfully with high luminosity peak lum:365×103cm/s(2011,68×1033cm2/s(2012) present buch space 50 ns, 30 collision/bunch crossing .Precise understanding pile-up effect is crucial for the analyses . Especially for analyses related with E miss and jets Au candidate 2/2/2021 onv∈ rice
Data taken with ATLAS detector in 2011-2012 11 2/2/2021 In 2011-2012, LHC operated successfully with high luminosity. •peak lumi : 3.65X1033 /cm2 /s (2011), 6.8X1033/cm2 /s (2012). • present buch space 50 ns, 30 collision/bunch crossing •Precise understanding pile-up effect is crucial for the analyses. •Especially for analyses related with ET miss and jets. low lum. high lum
Analysis strategy multi-jet analysis + Slicing phase space in regions with different S/B seems more optimal when inclusive analysis has little s/B Inclusive(H+ojet) H+ljet H+2jet 95 Tag jet n00000000 Tag jet WI 00000000 q 9 Not tagged WZ Tag jet Tag jet WZ2 WIZ Forward jets WZ WIZ q Not tagged Not Tagged Analyses in TDR were mostly inclusive Higgs Decay Applied to H-n,tt, Wo)
Inclusive (H+0jet) Analyses in TDR were mostly inclusive H+2jet Tag jet Tag jet Applied to H→gg,tt,WW(*) H+1jet Tag jet Tag jet Not Tagged f h Forward jets Higgs Decay Not tagged Not tagged Slicing phase space in regions with different S/B seems more optimal when inclusive analysis has little S/B 12 Analysis strategy : multi-jet analysis
Higgs Analysis with individual channels from 2011 and 2012 data
13 Higgs Analysis with individual channels from 2011 and 2012 data
H→ yy channel PHYSICAL Phys. Rev. Lett,2012,108,11803 PRL coVer REVIEW Phys.LetB,2011,705,452470 LETTERS eher 16 MARCH 2012 ATLAS-CONF-2011-161 ATLAS-CONF-2011-085 ATLAS-CONF-2011-071 ATLAS-CONF-2011-025 ATLAS-CONF-2011-004 2D0 ATLAS-CONF-2012-079 ATLAS 星+ 中 American Physieal Soclety. APS Volume 10s.Number Il 2/2/2021
H→γγ channel 14 2/2/2021 PRL cover Phys. Rev. Lett., 2012,108,11803 Phys. Lett. B, 2011, 705, 452-470 ATLAS-CONF-2011-161 ATLAS-CONF-2011-085 ATLAS-CONF-2011-071 ATLAS-CONF-2011-025 ATLAS-CONF-2011-004 ATLAS-CONF-2012-079
Signal and backgrounds for H-YY Ignal Higgs decays to diphoton via top /w triangle H e Small branching ratio as page 9 shows Expect 400 events(120 GeV) with 10 fb before any selection. T ° Backgrounds: 八 ● Irreducible Born Box 000 ●Born.BOx ● Reducible: diphoton Fragmentation Photon-jet/di-jet with one/two jets faking as a photon/photons o Advantage: side-band to fit the signal (the most important channel) nouVIon ∧ Photon-jets Di-iet 2/2/2021
Signal and backgrounds for H→γγ Signal : Higgs decays to diphoton via top/W triangle Small branching ratio as page 9 shows. Expect ~400 events (120 GeV) with 10 fb-1 before any selection. Backgrounds : Irreducible Born, Box Reducible : Photon-jet/di-jet with one/two jets faking as a photon/photons. Advantage : side-band to fit the signal (the most important channel) 2/2/2021 15 + ······· diphoton Born Box Fragmentation + + ······· Photon-jets + ······· Di-jet q g g