Results 31 to 40 of about 17,639 (221)
Evaluating multi-loop Feynman integrals numerically through differential equations
Journal of High Energy Physics, 2019 The computation of Feynman integrals is often the bottleneck of multi-loop calculations. We propose and implement a new method to efficiently evaluate such integrals in the physical region through the numerical integration of a suitable set of ...
Manoj K. Mandal, Xiaoran Zhao
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From dimensional regularization to NLO computations in four dimensions [PDF]
Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2015), 2016 Loop-tree duality (LTD) allows to express virtual contributions in terms of phase-space integrals, thus leading to a direct mapping with real radiation terms. We review the basis of the method and describe its application to regularize Feynman integrals.
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Perturbation theory of computing QCD jet cross sections beyond NLO accuracy [PDF]
Proceedings of 8th International Symposium on Radiative Corrections — PoS(RAD COR 2007), 2008 talk presented at the 8th International Symposium on Radiative Corrections, Florence, Italy, October 1-5 ...
Trocsanyi, Zoltan, Somogyi, Gabor
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QCD static force in gradient flow
Journal of High Energy Physics, 2022 We compute the QCD static force and potential using gradient flow at next-to-leading order in the strong coupling. The static force is the spatial derivative of the static potential: it encodes the QCD interaction at both short and long distances.
Nora Brambilla +3 more
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Computation of NLO processes involving heavy quarks using Loop-Tree Duality [PDF]
AIP Conference Proceedings, 2017 We present a new method to compute higher-order corrections to physical cross-sections, at Next-to-Leading Order and beyond. This method, based on the Loop Tree Duality, leads to locally integrable expressions in four dimensions. By introducing a physically motivated momentum mapping between the momenta involved in the real and the virtual ...
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Automation of NLO QCD and EW corrections with Sherpa and Recola [PDF]
, 2017 This publication presents the combination of the one-loop matrix-element generator Recola with the multipurpose Monte Carlo program Sherpa. Since both programs are highly automated, the resulting Sherpa+Recola framework allows for the computation of -in ...
Biedermann, Benedikt +5 more
core +3 more sources
Muon-electron scattering at NLO
Journal of High Energy Physics, 2019 We consider the process of muon-electron elastic scattering, which has been proposed as an ideal framework to measure the running of the electromagnetic coupling constant at space-like momenta and determine the leading-order hadronic contribution to the ...
Massimo Alacevich +5 more
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Computing decay rates for new physics theories with FeynRules and MadGraph 5_aMC@NLO [PDF]
Computer Physics Communications, 2015 32 pages, 2 figures.
Alwall, Johan +5 more
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Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs
Journal of High Energy Physics, 2017 We evaluate the master integrals for the two-loop, planar box-diagrams contributing to the elastic scattering of muons and electrons at next-to-next-to leading-order in QED.
Pierpaolo Mastrolia +3 more
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Automation of NLO computations using the FKS subtraction method [PDF]
Proceedings of RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) — PoS(RADCOR2009), 2010 In this talk the FKS subtraction method for next-to-leading order (in QCD) computations is reviewed and its automation in the computer code MadFKS is presented. As a proof of concept, some results in the form of plots for distributions at next-to-leading order in e+e− → 2, 3 and 4 jets are shown by interfacing this code to BlackHat and Rocket.
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