/ Phenomenology-HEP arXiv:1202.0378


Parity violating Moller scattering asymmetry up to the two-loop level


Aleksejevs, A.G. (Memorial U., Newfoundland) ; Barkanova, S.G. (Acadia U.) ; Bystritskiy, Yu.M. (Dubna, JINR) ; Kuraev, E.A. (Dubna, JINR) ; Ilyichev, A.N. (Minsk, NCPHEP) ; Zykunov, V.A. (Gomel State Tech. U.)

Pages: 27

Abstract: The paper investigates contributions of $Z$, $W$ and $\gamma$ intermediate states to the parity-violating Moller scattering asymmetry up to two-loop level. Using the Yennie--Frautschi--Suura factorization form for amplitudes, we demonstrate that QED corrections, with an exception of vacuum-polarization effects, cancel at the asymmetry level. We obtain chiral amplitudes at Born, one-loop and partially at two-loop level: boxes with lepton self-energies, ladder boxes and decorated boxes. Our calculations are relevant for the ultra-precise 11 GeV MOLLER experiment planned at Jefferson Laboratory and future ILC experiments. The numerical comparision of the two-loop contributions with the experimental accuracy of MOLLER is provided.

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Note: 27 pages, 15 figures

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 Record created 2012-03-21, last modified 2014-01-30


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