Power corrections in the N -jettiness subtraction scheme

Boughezal, Radja; Liu, Xiaohui; Petriello, Frank

doi:10.1007/jhep03(2017)160

Cited by 102 publications

(149 citation statements)

References 58 publications

(113 reference statements)

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“…10. This calculation has been performed as a function of the rapidity of the Higgs boson, the details of which will be presented (including also other Drell-Yan like processes) in a separate publication [58]. As can be seen from Fig.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

“…Finally by using a resolution parameter motivated by a physical factorization theorem, the approximations inherent in the method can be systematically improved, e.g. by analytic calculations of power-suppressed contributions [58].…”

Section: Introductionmentioning

confidence: 99%

Color-singlet production at NNLO in MCFM

et al. 2016

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“…Furthermore, a disagreement between the results of Refs. [31] and [30,32] for the hadronic T 0 was discussed in this paper.…”

Section: Introductionmentioning

confidence: 94%

Next-to-leading-logarithmic power corrections for N -jettiness subtraction in color-singlet production

2018

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We present a detailed derivation of the power corrections to the factorization theorem for the 0-jettiness event shape variable T . Our calculation is performed directly in QCD without using the formalism of effective field theory. We analytically calculate the next-to-leading logarithmic power corrections for small T at next-to-leading order in the strong coupling constant, extending previous computations which obtained only the leading-logarithmic power corrections. We address a discrepancy in the literature between results for the leading-logarithmic power corrections to a particular definition of 0-jettiness. We present a numerical study of the power corrections in the context of their application to the N-jettiness subtraction method for higher-order calculations, using gluon-fusion Higgs production as an example. The inclusion of the next-to-leading-logarithmic power corrections further improves the numerical efficiency of the approach beyond the improvement obtained from the leading-logarithmic power corrections.

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“…A detailed study of power corrections for N -jettiness subtractions using the operators in this paper was presented in [143], where the terms of O(α 2 s log 3 τ ) were computed explicitly. See also [144] for a calculation of the power corrections using alternative methods.…”

Section: Jhep11(2017)142mentioning

confidence: 99%

A complete basis of helicity operators for subleading factorization

Feige

Kolodrubetz

Moult

et al. 2017

J. High Energ. Phys.

193

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Factorization theorems underly our ability to make predictions for many processes involving the strong interaction. Although typically formulated at leading power, the study of factorization at subleading power is of interest both for improving the precision of calculations, as well as for understanding the all orders structure of QCD. We use the SCET helicity operator formalism to construct a complete power suppressed basis of hard scattering operators for e + e − → dijets, e − p → e − jet, and constrained Drell-Yan, including the first two subleading orders in the amplitude level power expansion. We analyze the field content of the jet and soft function contributions to the power suppressed cross section for e + e − → dijet event shapes, and give results for the lowest order matching to the contributing operators. These results will be useful for studies of power corrections both in fixed order and resummed perturbation theory.

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Power corrections in the N -jettiness subtraction scheme

Cited by 102 publications

References 58 publications

Color-singlet production at NNLO in MCFM

Color-singlet production at NNLO in MCFM

Next-to-leading-logarithmic power corrections for N -jettiness subtraction in color-singlet production

A complete basis of helicity operators for subleading factorization

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