The SAGEX review on scattering amplitudes Chapter 7: Positive geometry of scattering amplitudes

E Herrmann, J Trnka - Journal of Physics A: Mathematical and …, 2022 - iopscience.iop.org
Scattering amplitudes are both a wonderful playground to discover novel ideas in quantum
field theory and simultaneously of immense phenomenological importance to make …

[HTML][HTML] Generalized color orderings: CEGM integrands and decoupling identities

F Cachazo, N Early, Y Zhang - Nuclear Physics B, 2024 - Elsevier
In a recent paper, we defined generalized color orderings (GCO) and Feynman diagrams
(GFD) to compute color-dressed generalized biadjoint amplitudes. In this work, we study the …

Biadjoint scalars and associahedra from residues of generalized amplitudes

F Cachazo, N Early - Journal of High Energy Physics, 2023 - Springer
A bstract In the Grassmannian formulation of the S-matrix for planar\(\mathcal {N}\)= 4 Super
Yang-Mills, N k− 2 MHV scattering amplitudes for k negative and n− k positive helicity gluons …

Planarity in generalized scattering amplitudes: PK polytope, generalized root systems and worldsheet associahedra

N Early - arXiv preprint arXiv:2106.07142, 2021 - arxiv.org
In this paper we study the role of planarity in generalized scattering amplitudes, through
several closely interacting structures in combinatorics, algebraic and tropical geometry. The …

Superstring amplitudes from BCJ numerators at one loop

Y Geyer, J Guo, R Monteiro, L Ren - arXiv preprint arXiv:2410.19663, 2024 - arxiv.org
We find a direct map that determines moduli-space integrands for one-loop superstring
amplitudes in terms of field-theory loop integrands in the BCJ form. The latter can be …

New Aspects of Scattering Amplitudes, Higher-k Amplitudes, and Holographic Quark Gluon Plasmas

BG Umbert - 2023 - search.proquest.com
We present new results on different aspects of quantum field theory, which are divided into
three main parts. In part I, we find and prove a new behavior of massless tree-level …

Towards a categorification of scattering amplitudes

S Barmeier, P Oak, A Pal, K Ray… - arXiv preprint arXiv …, 2021 - arxiv.org
Categorification of scattering amplitudes for planar Feynman diagrams in scalar field
theories with a polynomial potential is reported. Amplitudes for cubic theories are directly …

New Aspects of Scattering Amplitudes, Higher-k Amplitudes, and Holographic Quark Gluon Plasmas

B Giménez Umbert - 2023 - ir.lib.uwo.ca
We present new results on different aspects of quantum field theory, which are divided into
three main parts. In part I, we find and prove a new behavior of massless tree-level …