Issue |
EPJ Web Conf.
Volume 212, 2019
The 12th International Workshop on e+e- Collisions from Phi to Psi (PhiPsi 2019)
|
|
---|---|---|
Article Number | 04012 | |
Number of page(s) | 5 | |
Section | e+e- Annihilation and Gamma-gamma Physics | |
DOI | https://doi.org/10.1051/epjconf/201921204012 | |
Published online | 17 June 2019 |
https://doi.org/10.1051/epjconf/201921204012
Study of the process e+e-→π+π-γ with the CMD-3 detector at the e+e- collider VEPP-2000
1
Budker Institute of Nuclear Physics SB RAS, Novosibirsk, 630090, Russia
2
Novosibirsk State University, Novosibirsk, 630090, Russia
3
Novosibirsk State Technical University, Novosibirsk, 630092, Russia
4
University of Victoria, Victoria, British Columbia, Canada V8W 3P6
5
Lebedev Physical Institute RAS, Moscow, 119333, Russia
* e-mail: tolmachacha@gmail.com
Published online: 17 June 2019
Existing Monte-Carlo generators with radiative corrections to the e+e-→π+π- process are usually developed under the assumption that pions can be treated as pointlike particles. We study the e+e-→π+π-γ process with final-state radiation and test this assumption using simulated events from the MCGPJ generator based on the scalar QED hypothesis. In order to increase a fraction of events with FSR, the analysis was performed in the energy region to the left from the ρ-meson peak (660÷785 MeV) that is based on the integrated luminosity of about 8.4 pb-1. The experimental data for the photon energy spectrum agree with the simulation results at 1% level.
© 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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