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Title: Pulling out all the tops with computer vision and deep learning

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1]
  1. Rutgers Univ., Piscataway, NJ (United States)

We apply computer vision with deep learning — in the form of a convolutional neural network (CNN) — to build a highly effective boosted top tagger. Previous work (the “DeepTop” tagger of Kasieczka et al) has shown that a CNN-based top tagger can achieve comparable performance to state-of-the-art conventional top taggers based on high-level inputs. Here, we introduce a number of improvements to the DeepTop tagger, including architecture, training, image preprocessing, sample size and color pixels. Our final CNN top tagger outperforms BDTs based on high-level inputs by a factor of ~ 2–3 or more in background rejection, over a wide range of tagging efficiencies and fiducial jet selections. As reference points, we achieve a QCD background rejection factor of 500 (60) at 50%top tagging efficiency for fully-merged (non-merged) top jets with pT in the 800–900 GeV (350–450 GeV) range. Our CNN can also be straightforwardly extended to the classification of other types of jets, and the lessons learned here may be useful to others designing their own deep NNs for LHC applications.

Research Organization:
Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0010008
OSTI ID:
1483579
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 10; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Cited By (17)

Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques text January 2020
Six top messages of new physics at the LHC journal October 2019
JEDI-net: a jet identification algorithm based on interaction networks journal January 2020
Performance of top-quark and $$\varvec{W}$$ W -boson tagging with ATLAS in Run 2 of the LHC journal April 2019
Automating the construction of jet observables with machine learning text January 2019
Topology Classification with Deep Learning to Improve Real-Time Event Selection at the LHC journal August 2019
The Machine Learning landscape of top taggers text January 2019
Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques text January 2020
Infrared Safety of a Neural-Net Top Tagging Algorithm text January 2018
Topology classification with deep learning to improve real-time event selection at the LHC text January 2018
Reports of My Demise Are Greatly Exaggerated: $N$-subjettiness Taggers Take On Jet Images text January 2018
Reweighting a parton shower using a neural network: the final-state case text January 2018
Energy Flow Networks: Deep Sets for Particle Jets text January 2018
Quark-Gluon Tagging: Machine Learning vs Detector text January 2018
Automating the Construction of Jet Observables with Machine Learning text January 2019
CapsNets Continuing the Convolutional Quest text January 2019
JEDI-net: a jet identification algorithm based on interaction networks text January 2019

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