Refinements in electroweak contributions to the muon anomalous magnetic moment
نویسندگان
چکیده
منابع مشابه
Electroweak fermion-loop contributions to the muon anomalous magnetic moment.
The two-loop electroweak corrections to the anomalous magnetic moment of the muon, generated by fermionic loops, are calculated. An interesting role of the top quark in the anomaly cancellation is observed. New corrections, including terms of order Gμαm 2 t , are computed and a class of diagrams previously thought to vanish are found to be important. The total fermionic correction is −(23±3)×10...
متن کاملElectroweak corrections to the muon anomalous magnetic moment.
We employ an effective Lagrangian approach to derive the leading-logarithm two-loop electroweak contributions to the muon anomalous magnetic moment, a µ. We show that these corrections can be obtained using known results on the anomalous dimensions of composite operators. We confirm the result of Czarnecki et al. for the bosonic part and present the complete sin 2 θ W dependence of the fermioni...
متن کاملHadronic contributions to the anomalous magnetic moment of the muon.
We present a new, completely revised calculation of the muon anomalous magnetic moment, aµ = (gµ − 2)/2, comparing it with the more recent experimental determination of this quantity; this furnishes an important test of theories of strong, weak and electromagnetic interactions. These theoretical and experimental determinations give the very precise numbers, In the theoretical evaluations, the f...
متن کاملThe Bnl Muon Anomalous Magnetic Moment Measurement
The E821 experiment at Brookhaven National Laboratory is designed to measure the muon magnetic anomaly, aμ, to an ultimate precision of 0.4 parts per million (ppm). Because theory can predict aμ to 0.6 ppm, and ongoing efforts aim to reduce this uncertainty, the comparison represents an important and sensitive test of new physics. At the time of this Workshop, the reported experimental result f...
متن کاملThe hadronic contributions to the anomalous magnetic moment of the muon
We present a new, completely revised calculation of the muon anomalous magnetic moment, aμ = (gμ − 2)/2, comparing it with the more recent experimental determination of this quantity; this furnishes an important test of theories of strong, weak and electromagnetic interactions. These theoretical and experimental determinations give the very precise numbers,
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2003
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.67.073006