4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

NLO and NNLO EWC for PV Møller Scattering

5 Jul 2012, 12:15
15m
Room 218 (Melbourne Convention and Exhibition Centre)

Room 218

Melbourne Convention and Exhibition Centre

Melbourne Australia
Poster Sessions Track 12. Formal Theory Developments TR 12 - Formal Theory Development & TR 1 - The Standard Model

Speaker

Dr Svetlana Barkanova (Acadia University (CA))

Description

High-precision electroweak experiments such as parity-violating Møller scattering can provide indirect access to physics at multi-TeV scales and play an important complementary role to the LHC research program. However, before physics of interest can be extracted from experimental data, electroweak radiative corrections, which can significantly reduce the cross-section asymmetry, must be calculated with an unprecedented completeness and accuracy. Although the two-loop corrections are strongly suppressed relative to the one-loop corrections, they can no longer be dismissed. We evaluate a full gauge-invariant set of one-loop and several types of the two-loop radiative corrections for the Møller asymmetry by combining two distinct but mutually-reinforcing techniques: semiautomatic, precise, with FeynArts and FormCalc as base languages, and “by hand”, with some approximations. For 11 GeV relevant for the MOLLER experiment planned at JLab, the results obtained by two approaches are in excellent agreement, which gives us assurance that our calculations are error-free. A possible way to incorporate new physics particles into theoretical predictions for the Møller asymmetry is briefly discussed at the end.

Primary authors

Aleksandrs Aleksejevs (Memorial University of Newfoundland) Dr Svetlana Barkanova (Acadia University (CA))

Presentation materials