104 citations · 393 across the 19 of their papers we have counts for
20 papers
Exact color sums for multi-gluon amplitudes: direct, multiplet and symmetric-group Fourier methods
Rikkert Frederix, Valentin Hirschi, Malin Sjödahl
We compare three approaches for computing color-summed tree-level all-gluon squared matrix elements: evaluation using direct contraction in the trace and adjoint decompositions, or…
One-loop calculations in the chirality-flow formalism
Andrew Lifson, Simon Plätzer, Malin Sjodahl
In a few recent papers we introduced the chirality-flow formalism, which was shown to make calculations of tree-level Feynman diagrams simple and transparent. Chirality flow, which…
Wigner 6j symbols for SU(N): Symbols with at least two quark-lines
Judith Alcock-Zeilinger, Stefan Keppeler, Simon Plätzer +1
We study a class of SU(N) Wigner 6j symbols involving two fundamental representations, and derive explicit formulae for all 6j symbols in this class. Our formulae express the 6j sy…
Amplitude Factorization in the Electroweak Standard Model
Simon Plätzer, Malin Sjodahl
We lay out the basis of factorization at the amplitude level for processes involving the entire Standard Model. The factorization appears in a generalized eikonal approximation in…
Automating scattering amplitudes with chirality flow
Andrew Lifson, Malin Sjodahl, Zenny Wettersten
Recently we introduced the chirality-flow formalism, a method which builds on the spinor-helicity formalism and is inspired by the color-flow idea in QCD. With this formalism, Feyn…
The chirality-flow formalism for the standard model
Joakim Alnefjord, Andrew Lifson, Christian Reuschle +1
In a recent paper we introduced the chirality-flow formalism, a method for simple and transparent calculations of Feynman diagrams based on the left- and right-chiral $\mathrm{sl}(…
Decomposing color structure into multiplet bases
Malin Sjodahl, Johan Thoren
We illustrate how QCD color structure elegantly can be decomposed into orthogonal multiplet bases corresponding to irreducible representations of SU(Nc) with the aid of Wigner 3j a…
Recursion in multiplet bases for tree-level MHV gluon amplitudes
Yi-Jian Du, Malin Sjodahl, Johan Thoren
We investigate the construction of tree-level MHV gluon amplitudes in multiplet bases using BCFW recursion. The multiplet basis decomposition can either be obtained by decomposing…
ColorFull -- a C++ library for calculations in SU(Nc) color space
Malin Sjodahl
ColorFull, a C++ package for treating QCD color structure, is presented. ColorFull, which utilizes the trace basis approach, is intended for interfacing with event generators, but…
Beyond the t-channel Approximation: Next-to-Leading Order QCD Corrections to Electroweak Higgs Boson Plus Three Jet Production at the LHC
Francisco Campanario, Terrance M. Figy, Simon Plätzer +1
In this talk we discuss the implementation of the full next-to-leading order QCD corrections to electroweak Higgs boson plus three jet production at the LHC within the Matchbox fra…
NLO QCD Corrections to Electroweak Higgs Boson Plus Three Jet Production at the LHC
Francisco Campanario, Terrance M. Figy, Simon Plätzer +1
The implementation of the full next-to-leading order (NLO) QCD corrections to electroweak Higgs boson plus three jet production at hadron colliders such as the LHC within the Match…
Electroweak Higgs plus Three Jet Production at NLO QCD
F. Campanario, T. M. Figy, S. Plätzer +1
We calculate next-to-leading order (NLO) QCD corrections to electroweak Higgs plus three jet production. Both vector boson fusion (VBF) and Higgs-strahlung type contributions are i…
Hermitian Young Operators
Stefan Keppeler, Malin Sjodahl
Starting from conventional Young operators we construct Hermitian operators which project orthogonally onto irreducible representations of the (special) unitary group.
Tools for calculations in color space
Malin Sjodahl, Stefan Keppeler
Both the higher energy and the initial state colored partons contribute to making exact calculations in QCD color space more important at the LHC than at its predecessors. This is…
Orthogonal multiplet bases in SU(Nc) color space
Stefan Keppeler, Malin Sjodahl
We develop a general recipe for constructing orthogonal bases for the calculation of color structures appearing in QCD for any number of partons and arbitrary Nc. The bases are con…
Subleading-Nc improved Parton Showers
Simon Plätzer, Malin Sjödahl
We present an algorithm for improving subsequent parton shower emissions by full SU(3) colour correlations in the framework of a dipole-type shower. As a proof of concept, we prese…
Subleading Nc improved Parton Showers
Simon Platzer, Malin Sjodahl
We describe an algorithm for improving subsequent parton shower emissions by full SU(3) color correlations in the framework of a dipole-type shower. As a proof of concept, we prese…
The Sudakov Veto Algorithm Reloaded
Simon Platzer, Malin Sjodahl
We perform a careful analysis of the main Monte Carlo algorithm used in parton shower simulations, the Sudakov veto algorithm. We prove a general version of the algorithm, directly…
Color structure for soft gluon resummation - a general recipe
Malin Sjodahl
A strategy for calculating the color structure needed for soft gluon resummation for processes with any number of colored partons is introduced using a N_c --> infinity inspired ba…
Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004
The Small x Collaboration, Jeppe R. Andersen Serguei Baranov, Jochen Bartels +26
A third workshop on small-x physics, within the Small-x Collaboration, was held in Hamburg in May 2004 with the aim of overviewing recent theoretical progress in this area and summ…