Abstract
The distorted spin-dependent spectral function of a nucleon inside an nucleus is introduced as a novel tool for investigating the polarized electron scattering off polarized in the semi-inclusive DIS regime (SiDIS), going beyond the standard plane-wave impulse approximation. This distribution function is applied to the study of the spectator SiDIS, , to properly take into account the final-state interaction between the hadronizing quark and the detected deuteron, with the final goal of a more reliable extraction of the polarized parton distribution inside a bound proton. Our analysis allows one to single out two well-defined kinematical regions where the experimental asymmetries could yield very interesting information: the region where the final-state effects can be minimized, and therefore the direct access to the parton distributions in the proton is feasible, and the one where the final-state interaction dominates, and the spectator SiDIS reactions can elucidate the mechanism of the quark hadronization itself. The perspectives of extending our approach (i) to the mirror nucleus, , for achieving a less model-dependent flavor decomposition and (ii) to the asymmetries measured in the standard SiDIS reactions, , with a detected fast hadron, with the aim of extracting the neutron transversity, are discussed.
2 More- Received 11 July 2013
- Revised 8 November 2013
DOI:https://doi.org/10.1103/PhysRevC.89.035206
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