| DATE: |
2004-11-09 11:00 - |
| PLACE: |
Kenkyu Honkan 2F RM 220 |
| TITLE: |
Theory of Lepton g-2; Improvement of QED terms |
| CONTACT: |
Tango |
| SPEAKER: |
Prof. Tom Kinoshita (Cornell) |
| LANGUAGE: |
English |
| ABSTRACT: |
This talk reports work in progress on the QED term of lepton g-2. Results obtained thus far are as follows: i) All $\alpha^4$ terms contributing to $a_\mu - a_e$ have been verified by at least two independent methods. ii) $\bullet$ Some $\alpha^5$ terms of $a_\mu$ and $a_e$ have been evaluated. iii) $\bullet$ Numerical precision of $a_\mu$ and $a_e$ have been improved substantially. iv) $\bullet$ New (tentative) value of the fine structure constant is obtained from theory and experiment of $a_e$, which will be improved further when the new measurement of $a_e$ is announced (soon). References: T. Kinoshita and M. Nio, Phys. Rev. Lett. 90, 021802 (2003). T. Kinoshita and M. Nio, arXiv:hep-ph/0402206.
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