Measuring the inclusive cross section of e+e− annihilation into hadrons in the pre-asymptotic energy range
K.Yu. Todysheva,b aBudker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, prosp. akad. Lavrenteva 11, Novosibirsk, 630090, Russian Federation bNovosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russian Federation
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/ 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)