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Helicity amplitudes in light-cone and Feynman-diagram gauges
The European Physical Journal Plus, 2022Recently proposed Feynman-diagram (FD) gauge propagator for massless and massive gauge bosons is obtained from a light-cone (LC) gauge propagator, by choosing the gauge vector along the opposite direction of the gauge boson three-momentum. We implement a
Junmou Chen +4 more
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On Feynman graphs, matroids, and GKZ-systems
Letters in Mathematical Physics, 2022We show in several important cases that the A-hypergeometric system attached to a Feynman diagram in Lee–Pomeransky form, obtained by viewing the coefficients of the integrand as indeterminates, has a normal underlying semigroup.
U. Walther
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1990
Abstract It’s nevertheless an endless mess before one can assess Nature’s inventiveness. A Feynman diagram [l] is a graphical representation of the amplitude for a given process. It is composed of three types of elements: external lines, internal lines and vertices.
R Gastmans, Tai Tsun Wu
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Abstract It’s nevertheless an endless mess before one can assess Nature’s inventiveness. A Feynman diagram [l] is a graphical representation of the amplitude for a given process. It is composed of three types of elements: external lines, internal lines and vertices.
R Gastmans, Tai Tsun Wu
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The Mathematical Intelligencer, 2017
The author presents arguments for and against understanding Feynman diagrams as models, in light of recent characterizations of model-making by philosophers of science. Observing that physicists employ such diagrams both as a ``paper tool'' and a ``complex model'', he advances the view of Feynman diagrams as a device mediating between mathematics and ...
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The author presents arguments for and against understanding Feynman diagrams as models, in light of recent characterizations of model-making by philosophers of science. Observing that physicists employ such diagrams both as a ``paper tool'' and a ``complex model'', he advances the view of Feynman diagrams as a device mediating between mathematics and ...
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Feynman diagrams without feynman parameters
Il Nuovo Cimento A, 1978Dimensionally regularized Feynman diagrams are represented by means of products ofk-functions. The infinite part of these diagrams is found very easily, also if they are overlapping, and the separation of the several kinds of divergences comes out quite naturally. Ward identities are proven in a transparent way.
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Il Nuovo Cimento A, 1965
Formulae expressing the amplitude for a Feynman diagram consisting of a single internal loop withn sides andn external lines as a sum of its reduced diagrams are derived by applying restrictions imposed by the finite dimensionality of space-time on the unparametrized amplitude.
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Formulae expressing the amplitude for a Feynman diagram consisting of a single internal loop withn sides andn external lines as a sum of its reduced diagrams are derived by applying restrictions imposed by the finite dimensionality of space-time on the unparametrized amplitude.
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Xfey, a Feynman diagram editor
Computer Physics Communications, 1998A graphical program, suitable for Feynman diagram drawings, is presented. It is mouse driven and easy to use. It is intended for those physicists who think they spend too much time drawing Feynman diagrams and want a tool to speed up the process.
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1998
The author’s tentative assumption is that we may approach the task of understanding brain function and predicting responses by using a large number of indicators.
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The author’s tentative assumption is that we may approach the task of understanding brain function and predicting responses by using a large number of indicators.
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The Number of Feynman Diagrams
Physical Review, 1953The Feynman-Dyson formulation of a perturbation expansion for quantum field theory allows one to give a general combinatorial treatment to the Feynman diagrams involved. A very simple analysis for the total number of such diagrams, $T(n, \ensuremath{\epsilon}, \ensuremath{\rho})$, in quantum electrodynamics, leads to: $T(n, \ensuremath{\epsilon ...
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Differential equations method. New technique for massive Feynman diagram calculation
, 1991A. Kotikov
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