Parity-violating deep-inelastic electron-deuteron scattering: Higher twist and parton angular momentum
We study the effect of parton angular momentum on the twist-four correction to the left-right asymmetry in the electron-deuteron parity-violating deep-inelastic scattering (PVDIS). We show that this higher-twist correction is transparent to the dynamics of parton angular momentum needed to account for the Sivers and Boer-Mulders functions and spin-independent parton distribution functions. A sufficiently precise measurement of the PVDIS asymmetry may, thus, provide additional information about the parton dynamics responsible for nucleon spin.
Additional Information© 2013 American Physical Society. Received 1 March 2013; revised manuscript received 13 June 2013; published 15 July 2013. We would like to thank A. Belitksy for useful discussions and F. Yuan and B. Pasquini for pointing us to explicit examples of the nucleon wave function amplitudes. We are also grateful to F. Yuan for a careful reading of the manuscript. This work is supported in part by DOE Contract No. DE-FG02-08ER41531 and by the Wisconsin Alumni Research Foundation.
Published - PhysRevC.88.015202.pdf
Submitted - 1302.5047v2.pdf