Substructure of high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>jets at the LHC

By Leandro Giordano Almeida, Seung J. Lee, G. Perez, G. Sterman, Ilmo Sung, J. Virzi. Physical Review D, 2008

133 citations recorded by the source corpus.

We study high-p{sub T} jets from QCD and from highly-boosted massive particles such as tops, W,Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jets from QCD are characterized by different patterns of energy flow compared to the products of highly-boosted heavy particle decays, and we employ a variety of jet shapes, observables restricted to energy flow within a jet, to explore this difference. Results from Monte Carlo generators and arguments based on perturbation theory support the discriminating power of the shapes we refer to as planar flow and angularities. We emphasize that for massive jets, these and other observables can be analyzed perturbatively.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/11853ed297956d2aea90ac29a0d2b6430c92872a

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In Nuclear and High Energy Physics

Citations in the corpus

Jet shapes and jet algorithms in SCET (2010, background): “Another type of strategy, explored in [12], to probe jet substructure is the use of jet shapes, which are modifications of event shapes [13] such as thrust.”
Phenomenology of event shapes at hadron colliders (2010, background): “4) and to the event shapes studied for boosted top-quark identification [40, 42].”
Energy flow polynomials: a complete linear basis for jet substructure (2017, background): “Useful observables can be constructed from the trace and determinant of C, such as planar flow Pf = 4 det C/(tr C)2 [101, 104], which is a ratio of two IRC-safe observables.”
Efficient identification of boosted semileptonic top quarks at the LHC (2010, unknown): “[9] L.”
Boosted objects: a probe of beyond the standard model physics (2010, background): “[37, 67] both proposed planar-flow type observables, for which one establishes the eigenvalues of a matrix such as”
Energy correlation functions for jet substructure (2013, methodology): “Recent substructure variables like planar flow [7, 9], Zernike coefficients [52], and Fox-Wolfram moments [53] are similarly sensitive to peculiar phase space configurations rather than prong-like substructure.”
Jet shapes with the broadening axis (2014, methodology): “As a concrete example, we calculate the jet angularities [13, 14, 22] with respect to the broadening axis b̂.”
Analytic boosted boson discrimination (2015, background): “Examples of such observables include ratios of N -subjettiness variables [63, 64], ratios of energy correlation functions [65–67], or planar flow [68].”
Maximizing boosted top identification by minimizing N-subjettiness (2011, background): “As a jet shape, N -subjettiness is interesting in its own right, since it is a calculable property of jets that generalizes the notion of jet angularities [22, 35, 36].”
Jet substructure at the Large Hadron Collider (2018, background): “In addition to the comprehensive studies of grooming options [57, 74, 86, 94, 95], ATLAS and CMS both investigated the discrimination powers for a plethora of jet substructure variables, including N -subjettiness [110, 111], Qjet volatility [154], ratios of energy correlation functions C 2 [117], D ”
Boosted objects and jet substructure at the LHC. Report of BOOST2012, held at IFIC Valencia, 23rd–27th of July 2012 (2013, background): “Jet angularity is an IRC safe variable (for a < 2) that can be used to separate multijet background from jets containing boosted objects [77].”
Playing tag with ANN: boosted top identification with pattern recognition (2015, background): “J H E P 0 7 ( 2 0 1 5 ) 0 8 6 tensors [16, 17] and other perturbatively calculable jet shapes [18].”
Soft drop (2014, background): “The value α = 2 is related to jet thrust/mass [7, 91, 107], α = 1 is related to jet broadening/girth/width [25, 47], and arbitrary α > 0 is related to the recoil-free angularities [102].”