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/

Zendy Plus

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

Zendy Tools

Zendy Open

Pohl et al. have reported a very precise measurement of the Lamb-shift inmuonic Hydrogen, from which they infer the radius characterizing the proton'scharge distribution. The result is 5 standard deviations away from the one ofthe CODATA compilation of physical constants. This has been interpreted aspossibly requiring a 4.9 standard-deviation modification of the Rydbergconstant, to a new value that would be precise to 3.3 parts in $10^{13}$, aswell as putative evidence for physics beyond the standard model. I demonstratethat these options are unsubstantiated.

QED is not endangered by the proton's size