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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the asymptotic limit $Q^2 \gg m^2$, the heavy quark form factors exhibitSudakov behavior. We study the corresponding renormalization group equations ofthe heavy quark form factors which do not only govern the structure of infrareddivergences, but also control the high energy logarithms. This enables us toobtain the complete logarithmic three--loop and partial four--loopcontributions to the heavy quark form factors in perturbative QuantumChromodynamics.

The asymptotic behavior of the heavy quark form factors at higher order