Results 91 to 100 of about 566,000 (274)
Labelled tree graphs, Feynman diagrams and disk integrals
Journal of High Energy Physics, 2017 In this note, we introduce and study a new class of “half integrands” in Cachazo-He-Yuan (CHY) formula, which naturally generalize the so-called Parke-Taylor factors; these are dubbed Cayley functions as each of them corresponds to a labelled tree graph.
Xiangrui Gao, Song He, Yong Zhang
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Feynman Diagrams in Four-Dimensional Holomorphic Theories and the Operatope [PDF]
, 2022 Kasia Budzik +4 more
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Optimized Copper Distribution and Enhanced Coercivity in PrO2‐Doped Sm2Co17‐Type Magnets
Rare Metals, EarlyView.ABSTRACT A rational design of Cu distribution is crucial for achieving optimal magnetic properties in Sm2Co17‐type magnets. In this study, nanostructured PrO2 powders were employed to induce Cu redistribution at grain boundaries while preserving the cellular microstructure. The corresponding coercivity (Hcj), remanence (Br), and maximum energy product (
Qi‐Qi Yang +5 more
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Rare Metals, EarlyView.ABSTRACT Transition metal carbides demonstrate exceptional mechanical properties but confront a critical hardness–toughness trade‐off. Spinodal decomposition‐mediated phase separation is an effective approach to enhance mechanical properties in carbide ceramics through high‐temperature treatment.
Zhi‐Xuan Zhang +6 more
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Tunnelling amplitudes through localised external potentials from Feynman diagram summation
European Physical Journal C: Particles and FieldsCurrently there is no general theory of quantum tunnelling of a particle through a potential barrier which is compatible with QFT. We present a complete calculation of tunnelling amplitudes for a scalar field for some simple potentials using quantum ...
Rosemary Zielinski +2 more
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d-dimensional SYK, AdS loops, and 6j symbols
Journal of High Energy Physics, 2019 We study the 6j symbol for the conformal group, and its appearance in three seemingly unrelated contexts: the SYK model, conformal representation theory, and perturbative amplitudes in AdS.
Junyu Liu +3 more
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Constructing Serrated Boride Composite Layer for Enhancing Wear Resistance of Ti6Al4V Alloy
Rare Metals, EarlyView.ABSTRACT Appropriate configuration combined with strong interface bonding is the essential requirement for developing high wear‐resistant coatings. Herein, based on the powder‐pack boriding process, the properties of Ti6Al4V alloy are effectively improved by constructing a serrate tribological boride composite layer.
Ying Wu +9 more
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The Born regime of gravitational amplitudes
Journal of High Energy PhysicsWe study the 2 → 2 scattering in the regime where the wavelength of the scattered objects is comparable to their distance but is much larger than any Compton wavelength in the quantum field theory.
Miguel Correia, Giulia Isabella
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The propagator seagull: general evaluation of a two loop diagram
Journal of High Energy Physics, 2019 We study a two loop diagram of propagator type with general parameters through the Symmetries of Feynman Integrals (SFI) method. We present the SFI group and equation system, the group invariant in parameter space and a general representation as a line ...
Barak Kol, Ruth Shir
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Feynman diagrams in terms of on-shell propagators [PDF]
, 2022 F. T. Brandt +2 more
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