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

We have made the comparison of three parametrizations of the protonelectromagnetic form factors in the space-like region using the largest dataset on $e^{\pm} p$ elastic scattering ever used. All models have a correctanalytical structure with a minimal set of well known singularities. For thefirst time an effective two-pion intermediate coulombic bound state (pionium)was included into GVMD for nucleon formfactors. For the proton charge radius anestimate derived from our best fits is as follows: r_E^p [\rm fm] = 0.897 \pm0.002(exp) \pm 0.001(norm) \pm 0.003(models). The traditional ``modelindependent'' fit by quadratic polynomial gives, in our estimation technology,a much cruder estimate r^p_{E,polinomial} [\rm fm] = 0.887 \pm 0.006(exp) \pm0.096(norm). Both estimates are closer to the value estimated from the recenthydrogen Lamb shift measurements.Comment: added reference and acknowledgement, links refreshe

REANALYSIS OF E P ELASTIC SCATTERING DATA IN TERMS OF PROTON ELECTROMAGNETIC FORM FACTORS