<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>N</mml:mi></mml:mrow></mml:math>-jettiness soft function at next-to-next-to-leading order

Boughezal, Radja; Liu, Xiaohui; Petriello, Frank

doi:10.1103/physrevd.91.094035

Cited by 111 publications

(132 citation statements)

References 83 publications

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“…However, more work is required to understand its structure, and an efficient organization of the color correlations at finite N c . Furthermore for the soft subjet factorization theorem, the final soft function has an additional eikonal line, since the jet substructure is resolved by the long wavelength global soft modes, further complicating the calculation (although there has recently been some progress in the computation of soft functions [165,166]). We emphasize however, that these are purely technical complications, and believe that the extension to a calculation of jet substructure in pp would be well worthwhile for improving our understanding of analytic jet substructure.…”

Section: Jhep05(2016)117mentioning

confidence: 99%

Analytic boosted boson discrimination

Larkoski

Moult

Neill

2016

J. High Energ. Phys.

107

166

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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 and successfully used, have been studied almost exclusively with Monte Carlo simulations. In this paper we present the first all-orders factorization theorem for a two-prong discriminant based on a jet shape variable, D 2 , valid for both signal and background jets. Our factorization theorem simultaneously describes the production of both collinear and soft subjets, and we introduce a novel zero-bin procedure to correctly describe the transition region between these limits. By proving an all orders factorization theorem, we enable a systematically improvable description, and allow for precision comparisons between data, Monte Carlo, and first principles QCD calculations for jet substructure observables. Using our factorization theorem, we present numerical results for the discrimination of a boosted Z boson from massive QCD background jets. We compare our results with Monte Carlo predictions which allows for a detailed understanding of the extent to which these generators accurately describe the formation of two-prong QCD jets, and informs their usage in substructure analyses. Our calculation also provides considerable insight into the discrimination power and calculability of jet substructure observables in general.

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Section: Jhep05(2016)117mentioning

confidence: 99%

Analytic boosted boson discrimination

Larkoski

Moult

Neill

2016

J. High Energ. Phys.

107

166

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“…[30]. The beam function B [31,32], the jet function J i [33,34] and the soft function S N for jets [35] and for the massive case [36] are all known to the required NNLO level. The results of eq.…”

Section: Review Of the Leading-power Factorization Theoremmentioning

confidence: 99%

Power corrections in the N -jettiness subtraction scheme

Boughezal¹,

Liu²,

Petriello³

2017

J. High Energ. Phys.

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101

143

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Abstract:We discuss the leading-logarithmic power corrections in the N -jettiness subtraction scheme for higher-order perturbative QCD calculations. We compute the next-toleading order power corrections for an arbitrary N -jet process, and we explicitly calculate the power correction through next-to-next-to-leading order for color-singlet production for both qq and gg initiated processes. Our results are compact and simple to implement numerically. Including the leading power correction in the N -jettiness subtraction scheme substantially improves its numerical efficiency. We discuss what features of our techniques extend to processes containing final-state jets.

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“…[69,70]. The corresponding two-loop soft functions are also known for zero-jettiness [71,72] and for general Njettiness [73]. The first process calculated at NNLO using this method was pp → W +jet [16], followed by calculations of the pp → Higgs+jet [8] and pp → Z +jet [18] processes, and by detailed phenomenological studies of these processes at this order [74][75][76].…”

Section: Introductionmentioning

confidence: 99%

Color-singlet production at NNLO in MCFM

et al. 2016

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We present the implementation of several colorsinglet final-state processes at Next-to-Next-to Leading Order (NNLO) accuracy in QCD to the publicly available parton-level Monte Carlo program MCFM. Specifically we discuss the processesDecays of the unstable bosons are fully included, resulting in a flexible fully differential Monte Carlo code. The NNLO corrections have been calculated using the non-local N -jettiness subtraction approach. Special attention is given to the numerical aspects of running MCFM for these processes at this order. We pay particular attention to the systematic uncertainties due to the power corrections induced by the N -jettiness regularization scheme and the evaluation time needed to run the hybrid openMP/MPI version of MCFM at NNLO on multiprocessor systems.

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N-jettiness soft function at next-to-next-to-leading order

Cited by 111 publications

References 83 publications

Analytic boosted boson discrimination

Analytic boosted boson discrimination

Power corrections in the N -jettiness subtraction scheme

Color-singlet production at NNLO in MCFM

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