32 Result(s)
within
Andrew J. Larkoski
English
Classical and Quantum Gravitation, Relativity Theory
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Article
Open AccessSoft theorems from effective field theory
The singular limits of massless gauge theory amplitudes are described by an effective theory, called soft-collinear effective theory (SCET), which has been applied most successfully to make all-orders predicti...
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Open AccessTracking down hyper-boosted top quarks
The identification of hadronically decaying heavy states, such as vector bosons, the Higgs, or the top quark, produced with large transverse boosts has been and will continue to be a central focus of the jet p...
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Article
Open AccessPower counting to better jet observables
Optimized jet substructure observables for identifying boosted topologies will play an essential role in maximizing the physics reach of the Large Hadron Collider. Ideally, the design of discriminating variabl...
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Open AccessGaining (mutual) information about quark/gluon discrimination
Discriminating quark jets from gluon jets is an important but challenging problem in jet substructure. In this paper, we use the concept of mutual information to illuminate the physics of quark/gluon tagging. ...
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Open AccessToward multi-differential cross sections: measuring two angularities on a single jet
The analytic study of differential cross sections in QCD has typically focused on individual observables, such as mass or thrust, to great success. Here, we present a first study of double differential jet cro...
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Open AccessSoft drop
We introduce a new jet substructure technique called “soft drop declustering”, which recursively removes soft wide-angle radiation from a jet. The soft drop algorithm depends on two parameters — a soft threshold
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Open AccessJet shapes with the broadening axis
Broadening is a classic jet observable that probes the transverse momentum structure of jets. Traditionally, broadening has been measured with respect to the thrust axis, which is aligned along the (hemisphere...
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Article
Unsafe but calculable: ratios of angularities in perturbative QCD
Infrared- and collinear-safe (IRC-safe) observables have finite cross sections to each fixed-order in perturbative QCD. Generically, ratios of IRC-safe observables are themselves not IRC safe and do not have a...
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Open AccessEnergy correlation functions for jet substructure
We show how generalized energy correlation functions can be used as a powerful probe of jet substructure. These correlation functions are based on the energies and pair-wise angles of particles within a jet, w...
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Open AccessAngular scaling in jets
We introduce a jet shape observable defined for an ensemble of jets in terms of two-particle angular correlations and a resolution parameter R. This quantity is infrared and collinear safe and can be interpreted ...
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Open AccessConstructing amplitudes from their soft limits
The existence of universal soft limits for gauge-theory and gravity amplitudes has been known for a long time. The properties of the soft limits have been exploited in numerous ways; in particular for relating...
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Open AccessJet substructure without trees
We present an alternative approach to identifying and characterizing jet substructure. An angular correlation function is introduced that can be used to extract angular and mass scales within a jet without ref...
