Results 31 to 40 of about 560,704 (224)
Automating scattering amplitudes with chirality flow
European Physical Journal C: Particles and Fields, 2022 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.
Andrew Lifson +2 more
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$$\theta $$ θ -diagram technique for $${\mathcal {N}}=1$$ N = 1 , $$d=4$$ d = 4 superfields
European Physical Journal C: Particles and Fields, 2023 We describe a diagrammatic procedure to carry out the Grassmann integration in super-Feynman diagrams of 4d theories expressed in terms of $${\mathcal {N}}=1$$ N = 1 superfields. This method is alternative to the well known D-algebra approach. We develop
D. Bason, M. Billò
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Specializations of partial differential equations for Feynman integrals
Nuclear Physics B, 2022 Starting from the Mellin–Barnes integral representation of a Feynman integral depending on a set of kinematic variables zi, we derive a system of partial differential equations w.r.t. new variables xj, which parameterize the differentiable constraints zi=
Vladimir V. Bytev +2 more
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µ−µ+ → νµνµttH amplitudes in the Feynman-diagram gauge [PDF]
EPJ Web of ConferencesWe study the process µ−µ+ → νµῡµ tt¯H with complex CP violating ttH couplings in the SMEFT with a dimension-6 operator. When the amplitudes are expressed in the Feynman-Diagram gauge, the dominance of the total cross section via the weak boson fusion ...
Zheng Ya-Juan
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Flow-oriented perturbation theory
Journal of High Energy Physics, 2023 We introduce a new diagrammatic approach to perturbative quantum field theory, which we call flow-oriented perturbation theory (FOPT). Within it, Feynman graphs are replaced by strongly connected directed graphs (digraphs).
Michael Borinsky +3 more
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Feynman diagrams and rooted maps
Open Physics, 2018 The rooted maps theory, a branch of the theory of homology, is shown to be a powerful tool for investigating the topological properties of Feynman diagrams, related to the single particle propagator in the quantum many-body systems.
Prunotto Andrea +2 more
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Journal of High Energy Physics, 2022 Scattering amplitudes in quantum field theories have intricate analytic properties as functions of the energies and momenta of the scattered particles.
Sebastian Mizera, Simon Telen
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Investigation of Pontryagin trace anomaly using Pauli-Villars regularization
Nuclear Physics B, 2022 In this paper, we investigate the Pontryagin trace anomaly for chiral fermions in a general curved background using Pauli-Villars regularization.
Chang-Yong Liu
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TOPICAL REVIEW: The Hopf algebra approach to Feynman diagram calculations [PDF]
, 2005 Two directional measuring device having an elongate measuring member having a distance measuring scale along its length and another measuring member to measure distance in another direction. The two members are relatively moveable in the direction of the
K. Ebrahimi-Fard, D. Kreimer
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Two-loop corrections to large order behavior of φ4 theory
Nuclear Physics B, 2017 We consider the large order behavior of the perturbative expansion of the scalar φ4 field theory in terms of a perturbative expansion around an instanton solution.
Enrico M. Malatesta +2 more
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