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

An analysis of all available data (CELLO, CLEO, \babar) in the range $[1\div40]$ GeV$^2$ for the pion-photon transition form factor in terms of light-conesum rules with next-to-leading-order accuracy is discussed, includingtwist-four contributions and next-to-next-to-leading order and twist-sixcorrections---the latter two via uncertainties. The antithetic trend betweenthe \babar data for the $\gamma^*\gamma\pi^0$ and those for the$\gamma^*\gamma\eta(\eta')$ transition is pointed out, emphasizing theunderlying antagonistic mechanisms: endpoint enhancement for the first andendpoint-suppression for the second---each associated with pseudoscalar mesondistribution amplitudes with distinct endpoint characteristics.

Pion-photon transition form factor. Living on the QCD frontier