Positronium contribution to the electron g-2
Event details
| Date | 14.12.2015 |
| Hour | 14:00 › 15:00 |
| Speaker | Matteo Fael |
| Location | |
| Category | Conferences - Seminars |
The contribution of positronium to the electron g-2 has been computed by G. Mishima in
arXiv:1311.7109, and found to be of the same order of α as that of five-loop perturbative QED.
In arXiv:1402.5690, K. Melnikov, A. Vainshtein, and M. Voloshin pointed out the presence of also a continuum nonperturbative contribution that cancels one-half of the positronium one.
In this talk I will review these two papers, and further show, as firstly argued by Melnikov et al., that the remaining one-half is already included in the five-loop perturbative result and it arises from the class I(i) of five-loop diagrams containing only one closed electron loop.
arXiv:1311.7109, and found to be of the same order of α as that of five-loop perturbative QED.
In arXiv:1402.5690, K. Melnikov, A. Vainshtein, and M. Voloshin pointed out the presence of also a continuum nonperturbative contribution that cancels one-half of the positronium one.
In this talk I will review these two papers, and further show, as firstly argued by Melnikov et al., that the remaining one-half is already included in the five-loop perturbative result and it arises from the class I(i) of five-loop diagrams containing only one closed electron loop.
Practical information
- General public
- Free
Organizer
- Riccardo Torre