| Issue |
EPJ Web Conf.
Volume 212, 2019
The 12th International Workshop on e+e- Collisions from Phi to Psi (PhiPsi 2019)
|
|
|---|---|---|
| Article Number | 08005 | |
| Number of page(s) | 5 | |
| Section | Tau-lepton Physics | |
| DOI | https://doi.org/10.1051/epjconf/201921208005 | |
| Published online | 17 June 2019 | |
https://doi.org/10.1051/epjconf/201921208005
Tau mass measurement at BES-III
1
Budker Institute of Nuclear Physics, Novosibirsk, Russia
2
Novosibirsk State University, Novosibirsk, Russia
3
Institute of High Energy Physics, Beijing, China
4
University of Chinese Academy of Sciences, Beijing, China
* e-mail: I.B.Nikolaev@inp.nsk.su
Published online: 17 June 2019
A scan of the threshold region of the process e+ e−→ τ+τ− with integrated luminosity about 140 pb−1 was performed with the BES-III detector at the BEPC-II collider in order to measure the τ-lepton mass. The beam energy was determined by the Compton backscattering method. To verify the measurement accuracy scans of the J/ψ and ψ′ resonances were performed.
© The Authors, published by EDP Sciences, 2019
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