Speaker
Andrei Kataev
(INR RAS and JINR)
Description
The QCD analysis of the available data of KEDR, BESIII and CLEO Collaborations
for the e^+e^ to hadrons total cross-sections in different orders of perturbation theory is analysed. The existence of the tension between KEDR and BESIII data is emphasized with the preference to KEDR Collaboration data . The obtained values of QCD coupling constant are compared to other world average extractions . The
material is based in part on the results of the recent work A.~L.~Kataev and K.~Y.~Todyshev,``Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $α_s$ determination,'' Natural Sci. Rev. \textbf{3} (2026), 100801
[arXiv:2603.29803 [hep-ph]].
