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81 papers
Rational Q-systems at Root of Unity I. Closed Chains
Jue Hou, Yunfeng Jiang, Yuan Miao
The solution of Bethe ansatz equations for XXZ spin chain with the parameter being a root of unity is infamously subtle. In this work, we develop the rational -system for th…
Resonance-aware NLOPS matching for off-shell production with semileptonic decays
Tomáš Ježo, Jonas M. Lindert, Stefano Pozzorini
The increasingly high accuracy of top-quark studies at the LHC calls for a theoretical description of production and decay in terms of exact matrix elements for the full…
Towards two-loop automation in OpenLoops
Stefano Pozzorini, Natalie Schär, Max F. Zoller
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 curre…
Precise predictions for V+2 jet backgrounds in searches for invisible Higgs decays
Jonas M. Lindert, Stefano Pozzorini, Marek Schönherr
We present next-to-leading order QCD and electroweak (EW) theory predictions for jet production, with , considering both the QCD and EW production modes and the…
Two-loop amplitude generation in OpenLoops
Stefano Pozzorini, Natalie Schär, Max F. Zoller
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…
Two-loop tensor integral coefficients in OpenLoops
Stefano Pozzorini, Natalie Schär, Max F. Zoller
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 op…