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Hadronic gamma-Z box corrections in Moller scattering

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arxiv 1311.3389 v3 pith:QXHBKFUU submitted 2013-11-14 nucl-th hep-phnucl-ex

Hadronic gamma-Z box corrections in Moller scattering

classification nucl-th hep-phnucl-ex
keywords scatteringgamma-zparity-violatingenergyolleraccuracyasymmetrybackground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The possibility of measuring the parity-violating asymmetry in M\oller scattering with sufficient accuracy to determine sin^2 theta_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.

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