树级弦振幅的洛伦兹等值线

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

SciPost Physics Pub Date : 2024-09-11 DOI:10.21468/scipostphys.17.3.078

Lorenz Eberhardt, Sebastian Mizera

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引用次数: 0

摘要

我们在零属黎曼曲面的模空间上设计了紧凑的等值线，实现了从欧几里得世界曲面到洛伦兹世界曲面的解析延续。这些广义的波克夏默等值线基于联方体的组合学，使得树级振幅的分析特性在任何数量和类型的外部弦上都能完全体现出来。我们在实践中使用它们，首次直接在物理运动学中对$n=4,5,6,7,8,9$的开放弦和封闭弦振幅进行数值计算。我们提供的代码允许任何人进行此类计算。

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Lorentzian contours for tree-level string amplitudes

We engineer compact contours on the moduli spaces of genus-zero Riemann surfaces that achieve analytic continuation from Euclidean to Lorentzian worldsheets. These generalized Pochhammer contours are based on the combinatorics of associahedra and make the analytic properties of tree-level amplitudes entirely manifest for any number and type of external strings. We use them in practice to perform first numerical computations of open and closed string amplitudes directly in the physical kinematics for $n=4,5,6,7,8,9$. We provide a code that allows anyone to do such computations.

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来源期刊

SciPost Physics Physics and Astronomy-Physics and Astronomy (all)

CiteScore

8.20

自引率

12.70%

发文量

315

审稿时长

10 weeks

期刊介绍： SciPost Physics publishes breakthrough research articles in the whole field of Physics, covering Experimental, Theoretical and Computational approaches. Specialties covered by this Journal: - Atomic, Molecular and Optical Physics - Experiment - Atomic, Molecular and Optical Physics - Theory - Biophysics - Condensed Matter Physics - Experiment - Condensed Matter Physics - Theory - Condensed Matter Physics - Computational - Fluid Dynamics - Gravitation, Cosmology and Astroparticle Physics - High-Energy Physics - Experiment - High-Energy Physics - Theory - High-Energy Physics - Phenomenology - Mathematical Physics - Nuclear Physics - Experiment - Nuclear Physics - Theory - Quantum Physics - Statistical and Soft Matter Physics.