31st International Workshop on Deep Inelastic Scattering

Single- and double-unresolved limits of polarised matrix elements

9 avr. 2024, 16:40

20m

Maison MINATEC, Grenoble, FRANCE

Regular parallel talk WG5: Spin and 3D Structure WG5

Orateur

Markus Löchner (University of Zurich)

Description

Calculations at NNLO in QCD require an analytic understanding of the infrared singular structure involving up to two unresolved partons, which was achieved up to now only for unpolarized matrix elements. We derive the full set of splitting amplitudes arising in longitudinally polarised tree-level QCD matrix elements at NNLO in the Larin ${\gamma }_5$ scheme. They are extracted from DIS-like processes and verified in matrix elements of higher multiplicity. Our results will enable the calculation of NNLO corrections to longitudinal spin asymmetries in polarized collider processes.

Documents de présentation

talk.pdf