Results 41 to 50 of about 560,704 (224)
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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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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A Feynman diagram analyser DIANA—graphic facilities [PDF]
, 2000 New developments concerning the extension of the recently introduced (1) Feynman diagram analyser DIANA are presented.
J. Fleischer, M. Tentyukov
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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
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Recursive method to obtain the parametric representation of a generic Feynman diagram [PDF]
, 2005 A recursive algebraic method which allows one to obtain the Feynman or Schwinger parametric representation of a generic $L$-loops and $(E+1)$ external lines diagram, in a scalar ${\ensuremath{\phi}}^{3}\ensuremath{\bigoplus}{\ensuremath{\phi}}^{4 ...
I. González, I. Schmidt
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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 +2 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
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W pair production at lepton colliders in the Feynman-diagram gauge [PDF]
EPJ Web of ConferencesIn ref. [1], we calculated helicity amplitudes for e−e+ → W−W+ in the Feynman-diagram (FD) gauge analytically, and showed that the cross section can be understood by the individual γ, Z and ν amplitudes in the FD gauge.
Furusato Hiroyuki +3 more
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Advanced Functional Materials, EarlyView.By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu +5 more
wiley +1 more source
NLO quark self-energy and dispersion relation using the hard thermal loop resummation
Journal of High Energy Physics, 2023 Using the hard-thermal-loop (HTL) resummation in real-time formalism, we study the next-to-leading order (NLO) quark self-energy and corresponding NLO dispersion laws.
Sumit, Najmul Haque, Binoy Krishna Patra
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