Splitting amplitudes at N3LO in QCD
OPEN ACCESS
Loading...
Author / Producer
Date
2025-01
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
In the limit where partons become collinear to each other, scattering amplitudes factorize into a product of universal, process-independent building blocks and scattering amplitudes involving fewer partons. We compute these universal building blocks — known as splitting amplitudes — for two collinear QCD partons up to third loop order in QCD. Our results describe arbitrary time-like splitting processes. Due to the violation of strict collinear factorization in space-like splitting processes, we specifically present space-like splitting amplitudes for three-parton QCD scattering amplitudes at third loop order. To achieve our results, we perform a collinear expansion of three-loop scattering amplitudes using a new expansion-by-subgraph technology, which is based on the method of regions.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
2025 (1)
Pages / Article No.
90
Publisher
Springer
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Factorization; Renormalization Group; Higher-Order Perturbative Calculations
Organisational unit
Notes
Funding
228411 - 10001706 - Singlular structure of two-loop amplitudes and their numerical evaluation (SNF)