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The Loop Momentum Amplituhedron

Ferro, Livia ; Łukowski, Tomasz

The journal of high energy physics, 2023-05, Vol.2023 (5), p.183-17, Article 183 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
The Loop Momentum Amplituhedron
Autor: Ferro, Livia ; Łukowski, Tomasz
Assuntos: Amplitudes ; Classical and Quantum Gravitation ; Elementary Particles ; Geometry ; Helicity ; High energy physics ; Kinematics ; Momentum ; Physics ; Physics and Astronomy ; Quantum Field Theories ; Quantum Field Theory ; Quantum Physics ; Regular Article - Theoretical Physics ; Relativity Theory ; Scattering Amplitudes ; String Theory ; Supersymmetric Gauge Theory ; Yang-Mills theory
É parte de: The journal of high energy physics, 2023-05, Vol.2023 (5), p.183-17, Article 183
Descrição: A bstract In this paper we focus on scattering amplitudes in maximally supersymmetric Yang-Mills theory and define a long sought-after geometry, the loop momentum amplituhedron, which we conjecture to encode tree and (the integrands of) loop amplitudes in spinor helicity variables. Motivated by the structure of amplitude singularities, we define an extended positive space, which enhances the Grassmannian space featuring at tree level, and a map which associates to each of its points tree-level kinematic variables and loop momenta. The image of this map is the loop momentum amplituhedron. Importantly, our formulation provides a global definition of the loop momenta. We conjecture that for all multiplicities and helicity sectors, there exists a canonical logarithmic differential form defined on this space, and provide its explicit form in a few examples.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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The Loop Momentum Amplituhedron

Ferro, Livia ; Łukowski, Tomasz

Berlin/Heidelberg: Springer Berlin Heidelberg

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