| Issue |
EPJ Web Conf.
Volume 212, 2019
The 12th International Workshop on e+e- Collisions from Phi to Psi (PhiPsi 2019)
|
|
|---|---|---|
| Article Number | 04005 | |
| Number of page(s) | 6 | |
| Section | e+e- Annihilation and Gamma-gamma Physics | |
| DOI | https://doi.org/10.1051/epjconf/201921204005 | |
| Published online | 17 June 2019 | |
https://doi.org/10.1051/epjconf/201921204005
Status of R value measurement at BESIII
Institute of High Energy Physics, CAS, Beijing
* e-mail: huhm@ihep.ac.cn
Published online: 17 June 2019
The dominant systematic error of R value measurement comes from the hadronic generator simulations. This paper reviews the present status of R value measurement from 2.232 to 3.671 GeV at 14 energy points, especially describes the calculations of initial state radiative correction and the issue of the parameter tuning for the Lund area law generator LUARLW.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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