Among the observed variety of natural phenomena reflected in experimental results, there are not many physical characteristics that allow a particular part of the mosaic of physical laws to be seen entirely. Precisely one such vivid fundamental characteristic is the ratio of the inclusive cross section of electron--positron annihilation into hadrons to the Born cross section of muon pair production, referred to as the value of R. Experiments on measuring the ratio R (s) in the range of energies from 1.84 to 3.72 GeV are considered in this review.

Keywords: R measurement, e+e− annihilation, inclusive hadronic cross section PACS: 12.20.Fv, 12.38.−t, 12.38.Aw, 13.66.Bc, 13.66.Jn (all) DOI: 10.3367/UFNe.2020.02.038731 URL: https://ufn.ru/en/articles/2020/9/e/ 000597245700005 2-s2.0-85098652618 2020PhyU...63..929T Citation: Todyshev K Yu "Measuring the inclusive cross section of e+e− annihilation into hadrons in the pre-asymptotic energy range" Phys. Usp. 63 929–939 (2020) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 26th, December 2019, revised: 27th, January 2020, accepted: 18th, February 2020 Оригинал: Тодышев К Ю «Измерение инклюзивного сечения e+e−-аннигиляции в адроны в предасимптотической области энергий» УФН 190 995–1005 (2020); DOI: 10.3367/UFNr.2020.02.038731