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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We show that as a result of causality-constrained coordinate spaceanalyticity, the Drell-Yan-shape transverse-momentum dependent soft factor inthe exponential regulator allows below-threshold (Euclidean) parametricrepresentations without cuts, to all orders in perturbation theory. Moreover,it is identical to another soft factor with natural interpretation as aspace-like form factor and this relation continues to hold for a larger classof TMD soft factors that interpolate between three different rapidityregulators: the off-light-cone regulator, the finite light-front lengthregulator and the exponential regulator.

Causality constraints on TMD soft factors: the exponential regulator without cuts