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Title: New angles on energy correlation functions

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [2]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Jet substructure observables, designed to identify specific features within jets, play an essential role at the Large Hadron Collider (LHC), both for searching for signals beyond the Standard Model and for testing QCD in extreme phase space regions. In this paper, we systematically study the structure of infrared and collinear safe substructure observables, defining a generalization of the energy correlation functions to probe n-particle correlations within a jet. These generalized correlators provide a flexible basis for constructing new substructure observables optimized for specific purposes. Focusing on three major targets of the jet substructure community — boosted top tagging, boosted W/Z/H tagging, and quark/gluon discrimination — we use power-counting techniques to identify three new series of powerful discriminants: Mi, Ni, and Ui. The Mi series is designed for use on groomed jets, providing a novel example of observables with improved discrimination power after the removal of soft radiation. The Ni series behave parametrically like the N -subjettiness ratio observables, but are defined without respect to subjet axes, exhibiting improved behavior in the unresolved limit. Finally, the Ui series improves quark/gluon discrimination by using higher-point correlators to simultaneously probe multiple emissions within a jet. Taken together, these observables broaden the scope for jet substructure studies at the LHC.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1379622
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 12; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 89 works
Citation information provided by
Web of Science

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Angular Scaling in Jets text January 2012
Precision Jet Substructure from Boosted Event Shapes text January 2012
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Cited By (24)

Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal January 2018
Subleading power factorization with radiative functions journal November 2019
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\text {V} $$ s = 13 Te journal March 2019
Lund jet images from generative and cycle-consistent adversarial networks journal November 2019
Inclusive search for a highly boosted Higgs boson decaying to a bottom quark-antiquark pair text January 2018
Quark jet versus gluon jet: fully-connected neural networks with high-level features journal June 2019
Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques text January 2020
Search for low-mass resonances decaying into bottom quark-antiquark pairs in proton-proton collisions at √s 13 TeV text January 2019
An equation-of-state-meter of quantum chromodynamics transition from deep learning journal January 2018
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton–proton collisions at $\sqrt{s}=13\,\text {Te}\text {V} $ text January 2019
Measurement of jet substructure observables in t¯t events from proton-proton collisions at √s=13 TeV text January 2018
Search for Low-Mass Quark-Antiquark Resonances Produced in Association with a Photon at √s = 13 TeV text January 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
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\sqrt{s}=13\,\text {Te}\text {V}$ text January 2019
Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair text January 2018
Aspects of track-assisted mass journal March 2019
Search for low-mass resonances decaying into bottom quark-antiquark pairs in proton-proton collisions at s = 13 TeV journal January 2019
Systematics of quark/gluon tagging text January 2017
Jet Substructure Studies with CMS Open Data text January 2017
Convolved Substructure: Analytically Decorrelating Jet Substructure Observables text January 2017
Energy flow polynomials: A complete linear basis for jet substructure text January 2017
Interpretable Deep Learning for Two-Prong Jet Classification with Jet Spectra text January 2019
Lund jet images from generative and cycle-consistent adversarial networks text January 2019

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