Sensitivity to new physics: a_e vs. a_mu
arXiv:0805.4313 · doi:10.1134/S1547477109050021
Abstract
At present it is generally believed that ``new physics'' effects contribute to leptonic anomalous magnetic moment, a_l, via quantum loops only and they are proportional to the squared lepton mass, (m_l)^2. An alternative mechanism for a contribution by new physics is proposed. It occurs at the tree level and exhibits a linear rather than quadratic dependence on m_l. This leads to a much larger sensitivity of a_e to the new physics than was expected so far.
4 pages, 2 figures
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