Hadronic gamma Z box corrections in Moeller scattering

The possibility of measuring the parity-violating asymmetry in Moeller scattering with sufficient accuracy to determine sin2[thetas]W to 0.1% offers a complementary path to the discovery of new physics to that followed at high energy colliders. We present a new calculation of the gamma Z box contrib...

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Bibliographic Details
Published in:Physics letters. B 2014-04, Vol.731, p.287-292
Main Authors: Hall, N L, Blunden, P G, Melnitchouk, W, Thomas, A W, Young, R D
Format: Article
Language:English
Subjects:
Asymmetry
Elementary particles
Energy (nuclear)
Energy distribution
Inelastic scattering
Mathematical analysis
Scattering
Uncertainty
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Summary:The possibility of measuring the parity-violating asymmetry in Moeller scattering with sufficient accuracy to determine sin2[thetas]W to 0.1% offers a complementary path to the discovery of new physics to that followed at high energy colliders. We present a new calculation of the gamma Z box contribution to parity-violating electron-proton scattering, which constitutes an important uncertainty in computing the background to this process. We show that while the gamma Z correction grows rapidly with energy, it can be relatively well constrained by data from parity-violating inelastic scattering and parton distribution functions.
ISSN:0370-2693
DOI:10.1016/j.physletb.2014.02.049