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

Coherent QCD radiation in the hadroproduction of top quark pairs leads to aforward--backward asymmetry that grows more negative with increasing transversemomentum of the pair. This feature is present in Monte Carlo event generatorswith coherent parton showering, even though the production process is treatedat leading order and has no intrinsic asymmetry before showering. In addition,depending on the treatment of recoils, showering can produce a positivecontribution to the inclusive asymmetry. We explain the origin of thesefeatures, compare them in fixed-order calculations and the Herwig++, Pythia andSherpa event generators, and discuss their implications.

QCD Coherence and the Top Quark Asymmetry