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Automated NNLL + NLO resummation for jet-veto cross sections

Becher, Thomas ; Frederix, Rikkert LU orcid ; Neubert, Matthias and Rothen, Lorena (2015) In European Physical Journal C 75(4).
Abstract

In electroweak-boson production processes with a jet veto, higher-order corrections are enhanced by logarithms of the veto scale over the invariant mass of the boson system. In this paper, we resum these Sudakov logarithms at next-to-next-to-leading logarithmic accuracy and match our predictions to next-to-leading-order (NLO) fixed-order results. We perform the calculation in an automated way, for arbitrary electroweak final states and in the presence of kinematic cuts on the leptons produced in the decays of the electroweak bosons. The resummation is based on a factorization theorem for the cross sections into hard functions, which encode the virtual corrections to the boson production process, and beam functions, which describe the... (More)

In electroweak-boson production processes with a jet veto, higher-order corrections are enhanced by logarithms of the veto scale over the invariant mass of the boson system. In this paper, we resum these Sudakov logarithms at next-to-next-to-leading logarithmic accuracy and match our predictions to next-to-leading-order (NLO) fixed-order results. We perform the calculation in an automated way, for arbitrary electroweak final states and in the presence of kinematic cuts on the leptons produced in the decays of the electroweak bosons. The resummation is based on a factorization theorem for the cross sections into hard functions, which encode the virtual corrections to the boson production process, and beam functions, which describe the low-pT emissions collinear to the beams. The one-loop hard functions for arbitrary processes are calculated using the MadGraph5_aMC@NLO framework, while the beam functions are process independent. We perform the resummation for a variety of processes, in particular for W+W- pair production followed by leptonic decays of the W bosons.

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author
; ; and
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
75
issue
4
pages
16 pages
publisher
Springer Nature
external identifiers
  • scopus:84928339394
ISSN
1434-6044
DOI
10.1140/epjc/s10052-015-3368-y
language
English
LU publication?
no
id
f4ed5bcc-7854-4897-bc62-a35480062c5d
date added to LUP
2019-05-28 15:40:10
date last changed
2025-04-04 14:53:59
@article{f4ed5bcc-7854-4897-bc62-a35480062c5d,
  abstract     = {{<p>In electroweak-boson production processes with a jet veto, higher-order corrections are enhanced by logarithms of the veto scale over the invariant mass of the boson system. In this paper, we resum these Sudakov logarithms at next-to-next-to-leading logarithmic accuracy and match our predictions to next-to-leading-order (NLO) fixed-order results. We perform the calculation in an automated way, for arbitrary electroweak final states and in the presence of kinematic cuts on the leptons produced in the decays of the electroweak bosons. The resummation is based on a factorization theorem for the cross sections into hard functions, which encode the virtual corrections to the boson production process, and beam functions, which describe the low-<sub>pT</sub> emissions collinear to the beams. The one-loop hard functions for arbitrary processes are calculated using the MadGraph5_aMC@NLO framework, while the beam functions are process independent. We perform the resummation for a variety of processes, in particular for W<sup>+</sup>W<sup>-</sup> pair production followed by leptonic decays of the W bosons.</p>}},
  author       = {{Becher, Thomas and Frederix, Rikkert and Neubert, Matthias and Rothen, Lorena}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{4}},
  publisher    = {{Springer Nature}},
  series       = {{European Physical Journal C}},
  title        = {{Automated NNLL + NLO resummation for jet-veto cross sections}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-015-3368-y}},
  doi          = {{10.1140/epjc/s10052-015-3368-y}},
  volume       = {{75}},
  year         = {{2015}},
}