32 Result(s)
within
Andrew J. Larkoski
English
Classical and Quantum Gravitation, Relativity Theory
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Article
Open AccessBinary discrimination through next-to-leading order
Binary discrimination between well-defined signal and background datasets is a problem of fundamental importance in particle physics. With detailed event simulation and the advent of extensive deep learning to...
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Open AccessFlavor fragmentation function factorization
A definition of partonic jet flavor that is both theoretically well-defined and experimentally robust would have profound implications for measurements and predictions especially for heavy flavor applications....
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Open AccessA spectral metric for collider geometry
By quantifying the distance between two collider events, one can triangulate a metric space and reframe collider data analysis as computational geometry. One popular geometric approach is to first represent ev...
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Open AccessA fragmentation approach to jet flavor
An intuitive definition of the partonic flavor of a jet in quantum chromodynamics is often only well-defined in the deep ultraviolet, where the strong force becomes a free theory and a jet consists of a single...
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Open AccessGrooming at the cusp: all-orders predictions for the transition region of jet groomers
Jet grooming has emerged as a necessary and vital tool for mitigating contamination radiation in jets. The additional restrictions on emissions imposed by the groomer can result in non-smooth behavior of resul...
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Open AccessA large-N expansion for minimum bias
Despite being the overwhelming majority of events produced in hadron or heavy ion collisions, minimum bias events do not enjoy a robust first-principles theoretical description as their dynamics are dominated ...
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Open AccessImproving the understanding of jet grooming in perturbation theory
Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in e+e− → h...
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Open AccessNavigating collinear superspace
We introduce a new set of effective field theory rules for constructing Lagrangians with N ...
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Open AccessCircumnavigating collinear superspace
In this paper, we extend the collinear superspace formalism to include the full range of N ...
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Open AccessCalculating pull for non-singlet jets
The pull vector is a jet observable sensitive to the distribution of soft radiation controlled by the color flow in a collider event. We present calculations to leading order in the soft and collinear limits f...
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Open AccessA theory of quark vs. gluon discrimination
Understanding jets initiated by quarks and gluons is of fundamental importance in collider physics. Efficient and robust techniques for quark versus gluon jet discrimination have consequences for new physics s...
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Open AccessNew insights on an old problem: resummation of the D-parameter
The D-parameter is one of the oldest and most experimentally well-studied hadronic observables for e+e− collisions. Nevertheless, unlike other classic observables like the C-parameter or thrust, the D-parameter h...
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Open AccessNovel jet observables from machine learning
Previous studies have demonstrated the utility and applicability of machine learning techniques to jet physics. In this paper, we construct new observables for the discrimination of jets from different origina...
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Open AccessFactorization and resummation for groomed multi-prong jet shapes
Observables which distinguish boosted topologies from QCD jets are playing an increasingly important role at the Large Hadron Collider (LHC). These observables are often used in conjunction with jet grooming a...
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Open AccessCasimir meets Poisson: improved quark/gluon discrimination with counting observables
Charged track multiplicity is among the most powerful observables for discriminating quark- from gluon-initiated jets. Despite its utility, it is not infrared and collinear (IRC) safe, so perturbative calculat...
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Open AccessSoft-collinear supersymmetry
Soft-Collinear Effective Theory (SCET) is a framework for modeling the infrared structure of theories whose long distance behavior is dominated by soft and collinear divergences. This paper demonstrates that S...
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Open AccessThe analytic structure of non-global logarithms: convergence of the dressed gluon expansion
Non-global logarithms (NGLs) are the leading manifestation of correlations between distinct phase space regions in QCD and gauge theories and have proven a challenge to understand using traditional resummation...
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Open AccessFactorization for groomed jet substructure beyond the next-to-leading logarithm
Jet grooming algorithms are widely used in experimental analyses at hadron colliders to remove contaminating radiation from within jets. While the algorithms perform a great service to the experiments, their i...
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Open AccessAnalytic boosted boson discrimination
Observables which discriminate boosted topologies from massive QCD jets are of great importance for the success of the jet substructure program at the Large Hadron Collider. Such observables, while both widely...
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Open AccessNon-global logarithms, factorization, and the soft substructure of jets
An outstanding problem in QCD and jet physics is the factorization and resummation of logarithms that arise due to phase space constraints, so-called non-global logarithms (NGLs). In this paper, we show that N...
