jet tagging with atlas for discoveries in run ii · the large hadron collider 2008-2013: e cm: 7.0...
TRANSCRIPT
![Page 1: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/1.jpg)
Jet tagging with ATLAS
for discoveries in Run II
Ayana Arce (Duke University)
November 5th 2014
![Page 2: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/2.jpg)
The Large Hadron Collider
2008-2013:
ECM: 7.0 – 8.0
TeV mH = 125.4 +/- 0.4
(ATLAS)
mH = 125.0 +/- 0.3 (CMS)
2015-2018:
ECM: 13 – 14
TeV
???
![Page 3: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/3.jpg)
Discoveries at the LHC
dark matter/low EWSB scale new physics
The LHC is prepared to find:
top partners
superpartners (squark/gluino)
new gauge couplings
extra dimensions
![Page 4: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/4.jpg)
the ATLAS detector
|η|< 2.5
σ(pT)/pT = 0.05% pT/GeV + 1%
3.0 < |η|< 4.9
σ(E)/E = 100%/√E
|η|< 3.2
σ(E)/E = 10%/√(E/GeV)
0 < |η|< 1.7
1.7 < |η|< 3.2
σ(E)/E = 50%/√E
EM Barrel/Endcap
Hadronic
Forward Calorimeter
Inner tracker
![Page 5: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/5.jpg)
Overview
What’s left to discover in
Run II?
Why jets? Why now?
Jet substructure tagging
experimental challenges +
solutions
Run I constraints on
models of new physics
using substructure tags
Outlook
![Page 6: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/6.jpg)
Prospects for discoveries
in Run II
![Page 7: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/7.jpg)
Probing the electroweak scale in
Run I
![Page 8: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/8.jpg)
Probing electroweak symmetry
breaking in Run I
![Page 9: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/9.jpg)
Beyond the electroweak scale
![Page 10: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/10.jpg)
![Page 11: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/11.jpg)
![Page 12: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/12.jpg)
Lessons from Run I
Higgs mass requires us to study a variety of
decays: • large branching fraction to bb
•Searches for exotic di-higgs, etc. require fermionic decay
channels
Next searches must probe multi-TeV mass
scales
• large pT for final-state particles in decay
•parton luminosity requires large acceptance in searches
Hadronic decays and boosted object
reconstruction are crucial in the Run II toolkit
![Page 13: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/13.jpg)
Looking towards Run II
We will probe higher
masses/boosts at the
same luminosity…
Qu
igg
: h
ttp
://lute
ce
.fna
l.g
ov/P
art
on
Lu
m
![Page 14: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/14.jpg)
Jet substructure at ATLAS
![Page 15: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/15.jpg)
Hadronic measurements at ATLAS
|η|< 3.2 : δφ ~ 0.025-0.1
σ(E)/E = 10%/√(E/GeV)
0 < |η|< 1.7: : δφ ~ 0.1
1.7 < |η|< 3.2 : δφ ~ 0.1
σ(E)/E = 50%/√E
EM Barrel/Endcap
Hadronic
![Page 16: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/16.jpg)
Hadronic reconstruction
perturbative shower suggests iterative, pairwise
merging algorithms:
jet reconstruction
![Page 17: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/17.jpg)
Jet reconstruction
stable hadrons
jets
Calorimeter jet
topological clusters
Calorimeter cells Truth jet
iteratively combine closest pairs of particles
distance = min(pTk) (ΔR/Rmax)
![Page 18: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/18.jpg)
Jet constituent observable
moments: calculations
from fragmentation functions
jet functions
m2 = (Σ Ei )2 – (Σ p i)
2
average jet charge jet mass
![Page 19: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/19.jpg)
Jet constituent observables: parton
shower
jet charge top jet mass
Kro
hn
et.
al. “
Je
t C
ha
rge
at th
e L
HC
” (2
01
2)
Bo
ost2
012 R
ep
ort
, E
PJC
74
(20
14
)
![Page 20: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/20.jpg)
Jet constituent calibration
Cluster constituents calibrated to local
hadron scale
Substructure moments re-calibrated at jet level
![Page 21: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/21.jpg)
Substructure-based
tagging
![Page 22: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/22.jpg)
Interesting particles are color singlet
Color singlet Color octet
![Page 23: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/23.jpg)
Charge conservation is powerful
![Page 24: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/24.jpg)
LHC backgrounds are … gluey
![Page 25: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/25.jpg)
q/g tagger
Sensitive variables Modeling
Color factor (g=3 vs. q=9/4) in substructure moments leads to many sensitive variables
Ga
llicchio
an
d S
ch
wa
rtz,
PR
L1
07 (
20
11
)
![Page 26: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/26.jpg)
High pT BG are mostly light partons
![Page 27: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/27.jpg)
![Page 28: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/28.jpg)
top/W tagging variables
Bu
tte
rwo
rth, C
ox,
Fors
ha
w (
20
02
) T
ha
ler,
Va
n T
ilbu
rg (
20
11
)
Splitting scale ~(m/2)2
n-subjettiness ~ 0
typically combined in a “tag”
![Page 29: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/29.jpg)
Top-tagging performance
![Page 30: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/30.jpg)
W-tagging correlations
![Page 31: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/31.jpg)
W-tagging performance
![Page 32: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/32.jpg)
Challenges in
substructure tagging
![Page 33: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/33.jpg)
the LHC environment
![Page 34: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/34.jpg)
Jet grooming
![Page 35: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/35.jpg)
Modeling substructure variables
Theory typically
predicts moments –
tagging uses
distributions
Parton showers may
disagree, and require
tuning
![Page 36: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/36.jpg)
Modeling substructure variables
![Page 37: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/37.jpg)
Data-driven efficiency: q/g tag
art
ist: M
. S
wia
tlo
wski
construct width and ntrk distributions
expected for pure samples
• bin in jet pT, η; fix flavor ratios to
MC predictions ⁃ also fix heavy flavor templates (shape
and normalization)
Solve to extract pure templates
![Page 38: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/38.jpg)
Data-driven efficiency: jet
charge/pull
Opposite to leptonic W
charge
Color singlet
Charge bias also
possible in W+jets,
dijets
![Page 39: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/39.jpg)
Jet charge validation
W → qq candidate charge Performance of a W+ tagger
AT
LA
S-C
ON
F-2
013-0
86
![Page 40: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/40.jpg)
Jet pull validation
![Page 41: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/41.jpg)
W-tagging validation
![Page 42: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/42.jpg)
top-tagging validation
![Page 43: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/43.jpg)
Challenging the SM with
substructure tags
![Page 44: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/44.jpg)
Search for W’ tb in hadronic
channel
Consider new gauge interactions in models
preferring quark/3rd gen couplings
![Page 45: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/45.jpg)
Top tagging variables
small differences in
signal distribution for
WL, WR due to top
polarization
![Page 46: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/46.jpg)
Limits on W’
![Page 47: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/47.jpg)
Search for W’ WZ, G* ZZ in
leptonic Z+jet channel
apply three signal regions (2 jet and 1
jet)
![Page 48: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/48.jpg)
Boosted channel backgrounds
![Page 49: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/49.jpg)
Limits
![Page 50: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/50.jpg)
Outlook
![Page 51: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/51.jpg)
Confronting Run II challenges
Strategy for 2015 Beyond Run II:
Tagger calibrations: • W, top tags: In-situ efficiency/fake
rate measurements from Run I
(being completed)
• better q/g purified samples
Pileup: •grooming and area
subtraction perform well
•also: track-based pileup
constraints (subjet JVT)
![Page 52: Jet tagging with ATLAS for discoveries in Run II · The Large Hadron Collider 2008-2013: E CM: 7.0 – 8.0 TeV m H = 125.4 +/- 0.4 ... Next searches must probe multi-TeV mass scales](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9fb54bfc036d2dac25b94d/html5/thumbnails/52.jpg)
Looking ahead
No evidence of physics beyond the SM in Run I
…but a great laboratory for careful validation of
jet tagging observables in data!
Will hadronic final states show us new physics
first in Run II?