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16 April 2024 |
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Article overview
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Automation of NLO processes and decays and POWHEG matching in WHIZARD | | J. Reuter
; B. Chokoufe
; A. Hoang
; W. Kilian
; M. Stahlhofen
; T. Teubner
; C. Weiss
; | | Date: |
19 Feb 2016 | | Abstract: | We give a status report on the automation of next-to-leading order processes
within the Monte Carlo event generator WHIZARD, using GoSam and OpenLoops as
provider for one-loop matrix elements. To deal with divergences, WHIZARD uses
automated FKS subtraction, and the phase space for singular regions is
generated automatically. NLO examples for both scattering and decay processes
with a focus on e+e- processes are shown. Also, first NLO-studies of
observables for collisions of polarized leptons beams, e.g. at the ILC, will be
presented. Furthermore, the automatic matching of the fixed-order NLO
amplitudes with emissions from the parton shower within the POWHEG formalism
inside WHIZARD will be discussed. We also present results for top pairs at
threshold in lepton collisions, including matching between a resummed threshold
calculation and fixed-order NLO. This allows the investigation of more
exclusive differential observables. | | Source: | arXiv, 1602.6270 | | Services: | Forum | Review | PDF | Favorites | |
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