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Seminars/Colloquia
“Four-loop QED corrections to the electron g-2”, by Dr. Stefano Laporta (INFN Bologna, Italy)
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Europe/Berlin
PH 3344 (TUM, Physik-Department)
PH 3344
TUM, Physik-Department
James-Franck-Str. 1, Garching
Description
Abstract:
The anomalous magnetic moment of the electron is one of the physical quantities measured with the highest precision. Such high precision demands a similar precision in the theoretical evaluations in order to obtain stringent tests of QED. In this talk I will show the results of the twenty-year long project of the evaluation of the mass-independent four-loop QED corrections to the electron g-2. I will show the 1100-digits results and the results of the high-precision analytical fits to the numerical values and I will describe the methods used. The consequences of this result on the QED tests and the determination of the fine structure constant will be also discussed.
The anomalous magnetic moment of the electron is one of the physical quantities measured with the highest precision. Such high precision demands a similar precision in the theoretical evaluations in order to obtain stringent tests of QED. In this talk I will show the results of the twenty-year long project of the evaluation of the mass-independent four-loop QED corrections to the electron g-2. I will show the 1100-digits results and the results of the high-precision analytical fits to the numerical values and I will describe the methods used. The consequences of this result on the QED tests and the determination of the fine structure constant will be also discussed.