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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We report on a study of the isospin-violating and conserving decays of theJ/psi and psi(2S) charmonium state to Lambda Lambdabar pi0 and Lambda Lambdabareta, respectively. The data are based on 225 million J/psi and 106 millionpsi(2S) events that were collected with the BESIII detector. The most accuratemeasurement of the branching fraction of the isospin-violating process J/psi->Lambda Lambdabar pi0 is obtained, and the isospin-conserving processes J/psi->Lambda Lambdabar eta and psi(2S) ->Lambda Lambdabar eta are observed for thefirst time. The branching fractions are measured to be B(J/psi ->LambdaLambdabar pi0) = (3.78+-0.27stat)+-0.29sys)10^-5; B(J/psi ->Lambda Lambdabareta) = (15.7+-0.79stat+-1.52sys)10^-5 and B(psi(2S) ->Lambda Lambdabar eta)=(2.47+-0.34stat+-0.19sys)10^-5. No significant signal events are observed forpsi(2S) ->Lambda Lambdabar pi0 decay resulting in an upper limit of thebranching fraction of B(psi(2S) ->Lambda Lambdabar pi0) < 0.29X10^-5 at the 90%confidence level. The two-body decay of J/psi-> Sigma(1385)^0 Lambdabar + c.c.is searched for, and the upper limit is B(J/psi-> Sigma(1385)^0 Lambdabar +c.c.) < 0.81X 10^-5 at the 90% confidence level.

Measurements of the branching fractions for J/psi and psi(2S) -> Lambda Lambdabar pi0 and Lambda Lambdabar eta