Results 31 to 40 of about 71,268 (259)
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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$$\theta $$ 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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High-precision calculation of the 4-loop QED contribution to the slope of the Dirac form factor
Physics Letters B, 2020 We have evaluated with 1100 digits of precision the contribution of all the 891 mass-independent 4-loop Feynman diagrams contributing to the slope of the Dirac form factor in QED.
Stefano Laporta
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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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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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Combinatorial summation of Feynman diagrams. [PDF]
Nat CommunAbstract Feynman’s diagrammatic series is a common language for a formally exact theoretical description of systems of infinitely-many interacting quantum particles, as well as a foundation for precision computational techniques.
Kozik E.
europepmc +5 more sources
Grope cobordism and feynman diagrams [PDF]
Mathematische Annalen, 2004 See http://www.math.cornell.edu/~jconant/pagethree.html for a PDF file with better figure ...
Conant, J., Teichner, P.
openaire +3 more sources
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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Journal of High Energy Physics, 2023 A number of diagrammatic “cutting rules” have recently been developed for the wavefunction of the Universe which determines cosmological correlation functions. These leverage perturbative unitarity to relate particular “discontinuities” in Feynman-Witten
Santiago Agüí Salcedo, Scott Melville
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Mixing of meson, hybrid, and glueball states [PDF]
, 2001 The effective QCD Hamiltonian is constructed with the help of the background perturbation theory, and relativistic Feynman--Schwinger path integrals for Green's functions. The resulting spectrum displays mass gaps of the order of one GeV, when additional
Simonov, Yu. A.
core +3 more sources