Work

Single- and double-unresolved limits of polarized tree-level matrix elements

Year: 2024

Type: conference-paper

Abstract: The calculation of exclusive cross sections at next-to-next-to-leading order (NNLO) in QCD requires an analytic understanding of the infrared singular structure with up to two unresolved partons. This has so far only been achieved for unpolarized matrix elements. We derive the full set of splitting amplitudes arising in longitudinally polarized tree-level QCD matrix elements at NNLO in the Larin $\gamma_5$ scheme. They are extracted from DIS-like processes, and are verified in matrix elements of higher multiplicity. Our results will enable the calculation of NNLO corrections to longitudinal spin asymmetries in polarized collider processes.

DOI: 10.22323/1.469.0219

Authors: Markus Löchner, Thomas Gehrmann

Institution: University of Zurich

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Awards: Precision Theory for High Energy Collider Physics, G5599649393, G628552264

OpenAlex ID: W4405847966

FWCI:

Cites: 4

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Related to: 10