Improved Evaluation of the Hadronic Vacuum Polarization Contributions to Muon $g-2$ and $\barα_{\rm QED}(M_Z)$ Using High Order QCD Calculations
| dc.creator | Adel, K. | |
| dc.creator | Ynduráin, F. J. | |
| dc.date | 1995-09-25 | |
| dc.date.accessioned | 2026-07-07T03:58:14Z | |
| dc.date.available | 2026-07-07T03:58:14Z | |
| dc.description | We use recently evaluated radiative and nonperturbative corrections to production of heavy quarks by a vector current to give very precise theoretical calculations of the high energy ($t^{1/2}\geq \sqrt{2}$ GeV) imaginary part of the photon vacuum polarization function, ${\rm Im}Π(t)$. This allows us to improve the corresponding contributions to the muon (or any other lepton) $g-2$ anomaly and to the running QED constant on the $Z$, $\barα_{\rm QED}(M_Z)$. This decreases the error in the evaluations by a factor between two and six for the high energy contribution, and by some 50\% for the overall result. We find for the hadronic contributions $a_h=6993.4\pm110.0\times10^{-11}$ and $Δα_h=272.59\pm4.09\times10^{-4}\,.$ | |
| dc.description | 12 pages, uses RevTeX, 1 postscript figure appended | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9509378 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9509378 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/45725 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Improved Evaluation of the Hadronic Vacuum Polarization Contributions to Muon $g-2$ and $\barα_{\rm QED}(M_Z)$ Using High Order QCD Calculations | |
| dc.type | text |