Final results of the measurement of R=σ(e+e−→hadrons)/σ(e+e−→μ+μ−) in the energy region from 2 to 5 GeV with the upgraded Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC) are presented. Preliminary results of the inclusive momentum spectra and second binomial moment measured with the R scan data at 2.2, 2.6, 3.0, 3.2, 4.6 and 4.8 GeV are reported.
@article{arxiv.hep-ex/0210042,
title = {Final R-value results from 2-5 GeV from BES and QCD test with R scan data},
author = {W. B. Yan and W. G. Li and Z. G. Zhao},
journal= {arXiv preprint arXiv:hep-ex/0210042},
year = {2016}
}