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Estimating two-loop radiative effects in the MOLLER experiment |
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| Authors: | A G Aleksejevs S G Barkanova V A Zykunov E A Kuraev |
| Institution: | 19959. Grenfell Campus Memorial University, 20 University Drive, Corner Brook, NL, A2H 5G4, Canada 29959. Acadia University, 15 University Ave, Wolfville, NS, B4P 2R6, Canada 39959. Belarussian State University of Transport, ul. Kirova 3, Gomel, 246653, Republic of Belarus 49959. Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia |
| Abstract: | Within the on-shell renormalization scheme, two-loop electroweak corrections to the parityviolating polarization asymmetry in the reaction e ? e ? → e ? e ?(γ, γγ) were estimated for the MOLLER experiment at JLab. The infrared divergence and the imaginary part of the amplitude were taken completely under control. Relevant compact expressions obtained by using asymptotic methods are free from unphysical parameters and are convenient for analysis and for numerical estimations. A numerical analysis revealed a significant scale of two-loop effects and the need for taking them into account in the MOLLER experiment. |
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