Twist-four Corrections to Parity-Violating Electron-Deuteron Scattering
A.V. Belitsky, A.N. Manashov, A. Schafer
TL;DR
This paper calculates twist-four corrections to parity-violating electron-deuteron scattering, aiming to refine the extraction of electroweak couplings by accounting for hadronic effects that introduce uncertainties.
Contribution
It introduces a calculation of twist-four correlation functions using nucleon multiparton light-cone wave functions, addressing a key source of theoretical uncertainty.
Findings
Quantified twist-four contributions to asymmetry.
Identified hadronic effects impacting electroweak measurements.
Provided a framework for more precise interpretation of scattering data.
Abstract
Parity violating electron-deuteron scattering can potentially provide a clean access to electroweak couplings that are sensitive to physics beyond the Standard Model. However hadronic effects can contaminate their extraction from high-precision measurements. Power-suppressed contributions are one of the main sources of uncertainties along with charge-symmetry violating effects in leading-twist parton densities. In this work we calculate the twist-four correlation functions contributing to the left-right polarization asymmetry making use of nucleon multiparton light-cone wave functions.
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