ar X iv : h ep - p h / 07 02 02 6 v 1 2 F eb 2 00 7 The τ lepton anomalous magnetic moment
نویسندگان
چکیده
We review the Standard Model prediction of the τ lepton g−2 presenting updated QED and electroweak contributions, as well as recent determinations of the leading-order hadronic term, based on the low energy e + e − data, and of the hadronic light-by-light one.
منابع مشابه
ar X iv : h ep - p h / 02 11 03 8 v 1 4 N ov 2 00 2 1 Measurement of the Muon Anomalous Magnetic Moment to 0 . 7 ppm [ 1 ]
• aμ(QED) = 11 658 470.57(0.29) × 10 (0.025 ppm) [13]. • aμ(had) = 683.3(7.7) × 10 (0.66 ppm), based on the ee value for the lowestorder hadronic correction of aμ(had, 1) = 684.7(7.0)× 10 (0.60 ppm) [9] since only these data can be directly related to aμ(had) without further theoretical assumptions. The higher-order hadronic contribution of aμ(had, 2) = −10.0(0.6) × 10 [11], and aμ(had, lbl) = ...
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