تقرير
Tenth-order lepton g-2: Contribution from diagrams containing a sixth-order light-by-light-scattering subdiagram internally
| العنوان: | Tenth-order lepton g-2: Contribution from diagrams containing a sixth-order light-by-light-scattering subdiagram internally |
|---|---|
| المؤلفون: | Aoyama, T., Asano, K., Hayakawa, M., Kinoshita, T., Nio, M., Watanabe, N. |
| المصدر: | Phys.Rev.D81:053009,2010 |
| سنة النشر: | 2010 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | This paper reports the result of our evaluation of the tenth-order QED correction to the lepton g-2 from Feynman diagrams which have sixth-order light-by-light-scattering subdiagrams, none of whose vertices couple to the external magnetic field. The gauge-invariant set of these diagrams, called Set II(e), consists of 180 vertex diagrams. In the case of the electron g-2 (a_e), where the light-by-light subdiagram consists of the electron loop, the contribution to a_e is found to be - 1.344 9 (10) (\alpha /\pi)^5. The contribution of the muon loop to a_e is - 0.000 465 (4) (\alpha /\pi)^5. The contribution of the tau-lepton loop is about two orders of magnitudes smaller than that of the muon loop and hence negligible. The sum of all of these contributions to a_e is - 1.345 (1) (\alpha /\pi)^5. We have also evaluated the contribution of Set II(e) to the muon g-2 (a_\mu). The contribution to a_\mu from the electron loop is 3.265 (12) (\alpha /\pi)^5, while the contribution of the tau-lepton loop is -0.038 06 (13) (\alpha /\pi)^5. The total contribution to a_\mu, which is the sum of these two contributions and the mass-independent part of a_e, is 1.882 (13) (\alpha /\pi)^5. Comment: 18 pages, 3 figures, REVTeX4, axodraw.sty used, changed title, corrected uncertainty of a_mu, added a reference |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.81.053009 |
| URL الوصول: | http://arxiv.org/abs/1001.3704 |
| رقم الأكسشن: | edsarx.1001.3704 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.81.053009 |
|---|