English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Singular factors originating from the QCD factorisation of scatteringamplitudes in soft and collinear limits play a prominent role in bothorganising and computing high-order perturbative contributions tohard-scattering cross sections. In this talk, we start from the factorisationstructure of scattering amplitudes in the collinear limit, and we introducecollinear functions that have a process-independent structure. These collinearfunctions, which are defined at the fully-differential level, can then beintegrated over the appropriate observable-dependent phase space to computelogarithmically-enhanced contributions to the corresponding observable. Fortransverse-momentum dependent observables, we show how the collinear functionscan be defined without introducing what is known as rapidity divergences in theliterature. We present the results of explicit computations of the collinearfunctions up to next-to-next-to-leading order in the QCD perturbation theory.

Azimuthally-correlated contributions to QCD transverse-momentum resummation at $\mathcal{O}(\alpha_{\rm S}^2)$