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

In a recent eprint [1] it is argued that the experimental determinations ofthe spin-dependent structure function g1 have been done incorrectly and that areanalysis of those data suggests that the original motivation to argue fora"spin crisis", namely the small contribution of quark spins to the nucleonspin, is invalid. In a subsequent note [2] the theoretical understanding, as ithas evolved from almost 30 years of theoretical and experimental scrutiny, hasbeen shortly summarised. In this short note, arguments are presented that theline of reasoning in Ref. [1] does not apply, at least not for the Compassdata.

Why there is no crisis of the "spin crisis"