Results 21 to 30 of about 560,704 (224)
Symmetry factors of Feynman diagrams and the homological perturbation lemma
Journal of High Energy Physics, 2020 We discuss the symmetry factors of Feynman diagrams of scalar field theories with polynomial potential. After giving a concise general formula for them, we present an elementary and direct proof that when computing scattering amplitudes using the ...
Christian Saemann +1 more
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Triangle diagram, distance geometry and Symmetries of Feynman Integrals
Journal of High Energy Physics, 2020 We study the most general triangle diagram through the Symmetries of Feynman Integrals (SFI) approach. The SFI equation system is obtained and presented in a simple basis.
Barak Kol, Subhajit Mazumdar
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Quantum field-theoretical descriprion of neutrino oscillations in T2K experiment [PDF]
EPJ Web of Conferences, 2019 We consider neutrino oscillations in the T2K experiment using a new quantum field-theoretical approach to the description of processes passing at finite space-time intervals.
Egorov Vadim, Rusalev Timofei
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Asymptotic analysis of Feynman diagrams and their maximal cuts
European Physical Journal C: Particles and Fields, 2020 The ASPIRE program, which is based on the Landau singularities and the method of Power geometry to unveil the regions required for the evaluation of a given Feynman diagram asymptotically in a given limit, also allows for the evaluation of scaling coming
B. Ananthanarayan +2 more
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Ladder and zig-zag Feynman diagrams, operator formalism and conformal triangles [PDF]
Journal of High Energy Physics, 2023 We develop an operator approach to the evaluation of multiple integrals for multiloop Feynman massless diagrams. A commutative family of graph building operators Hα for ladder diagrams is constructed and investigated.
S. Derkachov, A. Isaev, L. Shumilov
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Automatic generation of helicity amplitudes in the Feynman-diagram gauge [PDF]
Physical Review DWe develop a method to calculate helicity amplitudes of an arbitrary tree-level process in the Feynman-diagram (FD) gauge for an arbitrary gauge model with adraph5_a@. We start from the ’t Hooft–Feynman gauge Lagrangian in eynules and generate scattering
Kaoru Hagiwara +4 more
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Feynman Diagram Calculations with FeynArts, FormCalc, and LoopTools [PDF]
, 2010 This article describes the latest versions of the Mathematica packages FeynArts, FormCalc, and LoopTools for the generation and evaluation of one-loop diagrams.
T. Hahn
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Spacetime as a Feynman diagram: the connection formulation [PDF]
, 2000 Spin-foam models are the path-integral counterparts to loop-quantized canonical theories. Over the last few years several spin-foam models of gravity have been proposed, most of which live on finite simplicial lattice spacetime. The lattice truncates the
Michael P Reisenberger, C. Rovelli
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The twistor Wilson loop and the amplituhedron
Journal of High Energy Physics, 2018 The amplituhedron provides a beautiful description of perturbative superamplitude integrands in N = 4 $$ \mathcal{N}=4 $$ SYM in terms of purely geometric objects, generalisations of polytopes. On the other hand the Wilson loop in supertwistor space also
Paul Heslop, Alastair Stewart
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Hybrid Schrödinger-Feynman Simulation of Quantum Circuits With Decision Diagrams [PDF]
International Conference on Quantum Computing and Engineering, 2021 Classical simulations of quantum computations are vital for the future development of this emerging technology. To this end, decision diagrams have been proposed as a complementary technique which frequently allows to tackle the inherent exponential ...
Lukas Burgholzer +2 more
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