Embed Size (px)
Citation preview
Improving Jet Substructure Performance in ATLAS with Unified Tracking and Calorimeter InputsConnecting The Dots 2018
Roland Jansky, University of Geneva
21st March 2018
+ +
proton proton
something new?X
Jets at the Energy Frontier
• 𝑠 = 13
X
H
W
•
•
•
Jet Substructure (1/2)
two-prong structure (D2)
jet mass:
~ 1/pT ~ 1/mX
•
Jet Substructure (2/2)
Motivation for TrackCaloClusters (1/3)
•
•
•
•
•
•
•
•
•
•
•
•
ATL-PHYS-PUB-2017-015
•
•
•
•
Motivation for TrackCaloClusters (3/3)
W’(1 TeV) WZqqqq
ATL-PHYS-PUB-2017-015
Idea of TrackCaloClusters
•
•
•
•
σ𝑡𝑟𝑎𝑐𝑘• σ𝑐𝑙𝑢𝑠𝑡𝑒𝑟• σ𝑡𝑟𝑎𝑐𝑘 σ𝑐𝑙𝑢𝑠𝑡𝑒𝑟
• Δ𝑅 < σ𝑡𝑟𝑎𝑐𝑘2 + σ𝑐𝑙𝑢𝑠𝑡𝑒𝑟
2
•
• 𝜂 𝜙•
•
•
•
Tastes of TrackCaloClusters
• 𝑐
𝑘• 𝑐
𝑡•
𝑐𝑘
𝑡
Energy Reshuffling (1/2)
•
•
Energy Reshuffling (2/2)
W’(1 TeV) qqqq W’(5 TeV) qqqq
•
•
•
Matching Efficiencies
pTTCC > 10 GeV ηTCC < 2.5
“And Then There Were Jets”
•
𝑅 𝑓𝑐𝑢𝑡𝑅𝑠𝑢𝑏
Topo-clusterAnti-kt 𝑹=1.0 Jet (untrimmed)
kt 𝑹=0.2, 𝒇𝒄𝒖𝒕>5% sub-jets
“And Then There Were Jets”
•
𝑅 𝑓𝑐𝑢𝑡𝑅𝑠𝑢𝑏
Topo-clusterAnti-kt 𝑹=1.0 Jet (untrimmed)
kt 𝑹=0.2, 𝒇𝒄𝒖𝒕>5% sub-jets
“And Then There Were Jets”
•
𝑅 𝑓𝑐𝑢𝑡𝑅𝑠𝑢𝑏
Combined TCCCharged TCCNeutral TCCAnti-kt 𝑹=1.0 Jet (untrimmed)
kt 𝑹=0.2, 𝒇𝒄𝒖𝒕>5% sub-jets
“And Then There Were Jets”
•
𝑅 𝑓𝑐𝑢𝑡𝑅𝑠𝑢𝑏
Combined TCCCharged TCCNeutral TCCAnti-kt 𝑹=1.0 Jet (untrimmed)
kt 𝑹=0.2, 𝒇𝒄𝒖𝒕>5% sub-jets
Mass Performance (1/2)
• ℛ𝑟 = 𝑚reco/𝑚true
•
0.7 TeV < pT,jet < 0.8 TeV 2.1 TeV < pT,jet < 2.5 TeV
TCCLCTopo
Mass Performance (2/2)
•
IQR𝑟 =1
2
𝑄75 ℛ𝑟 −𝑄25 ℛ𝑟
𝑄50 ℛ𝑟 𝑄𝑥 𝑥
0.7 TeV < pT,jet < 0.8 TeV
LCTopoTCC
LCTopo
TCC
•
D2 Performance (1/2)
•
• ℛ𝑑 = 𝐷2reco − 𝐷2
true
•
0.7 TeV < pT,jet < 0.8 TeV 2.1 TeV < pT,jet < 2.5 TeV
TCC
LCTopoTCC LCTopo
D2 Performance (2/2)
•
IQR𝑑 =1
2𝑄75 ℛ𝑑 − 𝑄25 ℛ𝑑 𝑄𝑥 𝑥
0.7 TeV < pT,jet < 0.8 TeV
LCTopoTCC
1
2LCTopo
TCC
•
•
Summary
•
•
•
•
•
•
BACKUP
