Results 41 to 50 of about 71,268 (259)

Stochastic diagrams and Feynman diagrams [PDF]

Nuclear Physics B, 1985
Abstract We study the relationship between ordinary perturbation theory and perturbation theory obtained from stochastic quantization. We give a simple proof that, except in gauge theories, the several stochastic diagrams of a given topology are together equivalent to the corresponding Feynman diagram.
H. Hüffel, P.V. Landshoff
openaire   +1 more source

From Matrices to Strings and Back [PDF]

, 2009
We discuss an explicit construction of a string dual for the Gaussian matrix model. Starting from the matrix model and employing Strebel differential techniques we deduce hints about the structure of the dual string.
A Pakman, AS Alexandrov, B Zwiebach, D Berenstein, D Gaiotto, E Witten, H Ooguri, I Yaakov, JR David, JR David, K Furuuchi, K Strebel, M Kontsevich, N Berkovits, N Berkovits, N Berkovits, N Berkovits, N Itzhaki, O Aharony, O Aharony, R Gopakumar, R Gopakumar, R Gopakumar, R Gopakumar, RC Penner, SB Giddings, Shlomo S. Razamat, SS Razamat   +27 more
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Exact Solutions v.s. Perturbative Calculations of Finite Φ3-Φ4 Hybrid-Matrix-Model

Nuclear Physics B, 2023
There is a matrix model corresponding to a scalar field theory on noncommutative spaces called Grosse-Wulkenhaar model (Φ4 matrix model), which is renormalizable by adding a harmonic oscillator potential to scalar Φ4 theory on Moyal spaces.
Naoyuki Kanomata, Akifumi Sako
doaj   +1 more source

Structure of light-front vacuum sector diagrams

Physics Letters B, 2019
We study the structure of scalar field light-front quantization vacuum graphs. In instant-time quantization both non-vacuum and vacuum graphs can equivalently be described by either the off-shell four-dimensional Feynman diagram approach or the on-shell ...
Philip D. Mannheim, Peter Lowdon, Stanley J. Brodsky   +2 more
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Loop lessons from Wilson loops in N=4 supersymmetric Yang-Mills theory

, 2011
N=4 supersymmetric Yang-Mills theory exhibits a rather surprising duality of Wilson-loop vacuum expectation values and scattering amplitudes. In this paper, we investigate this correspondence at the diagram level.
A Brandhuber, A Brandhuber, A Gorsky, A Gorsky, AI Davydychev, Andrea Banfi, C Anastasiou, C Anastasiou, C Anastasiou, C Anastasiou, Charalampos Anastasiou, EE Boos, F Cachazo, G Kramer, GP Korchemsky, JA Minahan, JB Tausk, JM Drummond, JM Drummond, JM Maldacena, LF Alday, MB Green, N Beisert, N Beisert, T Binoth, V Duca Del, V Duca Del, V Duca Del, Z Bern, Z Bern, Z Bern, Z Bern   +31 more
core   +1 more source

Finite calculation of divergent selfenergy diagrams

, 2003
Using dispersive techniques, it is possible to avoid ultraviolet divergences in the calculation of Feynman diagrams, making subsequent regularization of divergent diagrams unnecessary.
A Aste, Artru J.L., Aste G., Aste G., Aste G., Barnich M., Bashir R., Bauberger F.A., Berends A.I., Berends J.B., Berends M., Bogoliubov O.S., Broadhurst J., Brunetti K., Caffo H., Caffo H., Caffo H., Constantinescu M., D Trautmann, Davydychev V.A., Denner S., Dütsch K., Epstein V., Fleischer A.V., Gracia-Bondia S., Groote A.A., Groote J.G., Hooft B., Hurth K., Källén A., Pauli F., Post J.B.   +31 more
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Description of processes passing at finite space and time intervals in the framework of QFT [PDF]

EPJ Web of Conferences, 2019
We consider a new approach to the description in the framework of QFT of processes passing at finite space and time intervals. The formalism is based on the Feynman diagram technique in the coordinate representation, in which the rules of passing to the ...
Egorov Vadim, Volobuev Igor
doaj   +1 more source

Navigating Around the Algebraic Jungle of QCD: Efficient Evaluation of Loop Helicity Amplitudes

, 1992
A method is developed whereby spinor helicity techniques can be used to simplify the calculation of loop amplitudes. This is achieved by using the Feynman-parameter representation where the offending off-shell loop momenta do not appear.
Abbott, Abott, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Berends, Bern, Bern, Bern, Bern, C.S. Lam, De Causmaecker, De Causmaecker, Dunn, Grisaru, Gunion, Gunion, Gunion, Gunion, Hagiwara, Kleiss, Kleiss, Kosower, Kosower, Kunzt, Lam, Mangano, Mangano, Mangano, Mangano, Mangano, Parke, Parke, Parke, Parke, Paton, Strassler, Xu   +46 more
core   +2 more sources

The Coupling of Gravity to Spin and Electromagnetism [PDF]

, 1996
The coupled Einstein-Dirac-Maxwell equations are considered for a static, spherically symmetric system of two fermions in a singlet spinor state. Stable soliton-like solutions are shown to exist, and we discuss the regularizing effect of gravity from a ...
Finster, Felix, Smoller, Joel, Yau, Shing-Tung   +2 more
core   +3 more sources

Leading singularities in Baikov representation and Feynman integrals with uniform transcendental weight

Journal of High Energy Physics, 2021
We provide a leading singularity analysis protocol in Baikov representation, for the searching of Feynman integrals with uniform transcendental (UT) weight.
Christoph Dlapa, Xiaodi Li, Yang Zhang
doaj   +1 more source