High-precision calculation of the 4-loop QED contribution to the slope of the Dirac form factor
We have evaluated with 1100 digits of precision the contribution of all the 891 mass-independent 4-loop Feynman diagrams contributing to the slope of the Dirac form factor in QED. The total 4-loop contribution ism2F1(4)′(0)=0.886545673946443145836821730610315359390424032660064745…(απ)4. We have fit...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319308597 |