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

The anomalous line shape of the $\psi(3770)$ state has resulted in somedifficulty in the determination of the $R$ value for the continuum light hadronproduction in the resonance energy range. We parameterize the asymmetric lineshape using a Fano-type formula and extract the $R_{uds}$ value to be $2.156\pm0.022$ from the data of BESIII Collaboration in the energy region between 3.650and 3.872 GeV. The small discrepancy between experiment and theory is removed.The cross sections of the $e^+e^- \rightarrow hadrons$ are given by subtractingthe part of continuum light hadron production and are compared to the data ofthe $e^+e^- \rightarrow D\bar{D}$ reaction.

The $R_{uds}$ value in the vicinity of $\psi(3770)$ state