Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Pozzorini, Stefano"'
The increasingly high accuracy of top-quark studies at the LHC calls for a theoretical description of $t\bar t$ production and decay in terms of exact matrix elements for the full $2\to 6$ process that includes the off-shell production and the chain
Externí odkaz:
http://arxiv.org/abs/2307.15653
NLO scattering amplitudes are provided by fully automated numerical tools, such as OpenLoops, for a very wide range of processes. In order to match the numerical precision of current and future collider experiments, the higher precision of NNLO calcu
Externí odkaz:
http://arxiv.org/abs/2207.07468
We present next-to-leading order QCD and electroweak (EW) theory predictions for $V+2\,$jet production, with $V=Z,W^{\pm}$, considering both the QCD and EW production modes and their interference. We focus on phase-space regions where $V+2\,$jet prod
Externí odkaz:
http://arxiv.org/abs/2204.07652
Publikováno v:
SciPost Phys. Proc. 7 (2022) 018
Numerical tools, such as OpenLoops, provide NLO scattering amplitudes for a very wide range of hard scattering amplitudes in a fully automated way. In order to match the numerical precision of current and future experiments, however, the higher preci
Externí odkaz:
http://arxiv.org/abs/2202.00703
Publikováno v:
JHEP 05 (2022) 161
We present a new and fully general algorithm for the automated construction of the integrands of two-loop scattering amplitudes. This is achieved through a generalisation of the open-loops method to two loops. The core of the algorithm consists of a
Externí odkaz:
http://arxiv.org/abs/2201.11615
Publikováno v:
JHEP 01 (2022) 105
Rational counterterms are a key ingredient for the automation of loop calculations through numerical methods. Building on the recently established properties of rational terms of UV origin at two loops, in this paper we present a systematic method fo
Externí odkaz:
http://arxiv.org/abs/2107.10288
Scattering amplitudes in $D$ dimensions involve particular terms that originate from the interplay of UV poles with the $D-4$ dimensional parts of loop numerators. Such contributions can be controlled through a finite set of process-independent ratio
Externí odkaz:
http://arxiv.org/abs/2007.03713
Publikováno v:
PoS(RADCOR2019)081
We present an extension of the renormalisation procedure based on the R-operation in $D$ dimensions at two-loop level, in which the numerators of all Feynman diagrams can be constructed in four dimensions, and the rational terms stemming from the int
Externí odkaz:
http://arxiv.org/abs/2006.02852
Publikováno v:
JHEP 05 (2020) 077
The advent of efficient numerical algorithms for the construction of one-loop amplitudes has played a crucial role in the automation of NLO calculations, and the development of similar algorithms at two loops is a natural strategy for NNLO automation
Externí odkaz:
http://arxiv.org/abs/2001.11388
Autor:
Grazzini, Massimiliano, Kallweit, Stefan, Lindert, Jonas M., Pozzorini, Stefano, Wiesemann, Marius
Publikováno v:
JHEP 2002 (2020) 087
We present the first combination of NNLO QCD and NLO EW corrections for vector-boson pair production at the LHC. We consider all final states with two, three and four charged leptons, including resonant and non-resonant diagrams, spin correlations an
Externí odkaz:
http://arxiv.org/abs/1912.00068