Finite-Q^2 corrections to parity-violating DIS

Details Finite-Q^2 corrections to parity-violating DIS Finite-Q^2 corrections to parity-violating DIS

2008-01-30

arxiv.org/abs/0801.4791v3

Phys.Rev.D77:114023,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 10 figures; figures 8 and 9 corrected

Scientific paper

10.1103/PhysRevD.77.114023

Parity-violating deep inelastic scattering (PVDIS) has been proposed as an important new tool to extract the flavor and isospin dependence of parton distributions in the nucleon. We discuss finite-Q^2 effects in PVDIS asymmetries arising from subleading kinematical corrections and longitudinal contributions to the photon-Z interference. For the proton, these need to be accounted for in order to accurately extract the d/u ratio at large x; for the deuteron they are important to consider when searching for evidence of charge symmetry violation in parton distributions or signals for physics beyond the standard model. We further explore the dependence of PVDIS asymmetries for polarized targets on the u and d helicity distributions at large x.

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