| Issue |
EPJ Web Conf.
Volume 218, 2019
The 11th International Workshop on e+e− Collisions from Phi to Psi (PhiPsi 2017)
|
|
|---|---|---|
| Article Number | 02010 | |
| Number of page(s) | 7 | |
| Section | Hadronic Cross Section Measurements in e+e− Annihilations | |
| DOI | https://doi.org/10.1051/epjconf/201921802010 | |
| Published online | 18 October 2019 | |
https://doi.org/10.1051/epjconf/201921802010
Direct, Resonant Production of States with Positive Charge Conjugation in Electron-Positron Annihilation
1
Institute of Physics, University of Silesia, PL-40007 Katowice, Poland
2
Institutfür Theoretische Teilchenphysik, KarlsruheInstitute of Technology , D-76128 Karlsruhe, Germany
* Work supported in part by the Polish National Science Centre, grant number DEC-2012/07/B/ST2/03867 and German Research Foundation DFG under Contract No. Collaborative Research Center CRC-1044.
Published online: 18 October 2019
Recent theory results on direct production of resonances with positive charge conjugationin electron-positron annihilation are reviewed. The strong modeldependence is emphasized, with predictions varying between 0.03 eV and 0.43 eV for the charmonium state with JPC = 1++ and between0.16 eV and4.25 eV for the state with JPC =2++. For the state with JPC = 0++ the cross section is of O 
and thus negligeable for all practical purpose. The importance of the relative phase of the production amplitude is emphasized.
© The Authors, published by EDP Sciences, 2019
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