Nuclear enhanced power corrections to DIS structure functions
Xiaofeng Guo, Jianwei Qiu, Wei Zhu
Abstract
We calculate nuclear enhanced power corrections to structure functions measured in deeply inelastic lepton-nucleus scattering in Quantum Chromodynamics (QCD). We find that the nuclear medium enhanced power corrections at order of O(αs/Q2) enhance the longitudinal structure function FL, and suppress the transverse structure function F1. We demonstrate that strong nuclear effects in σA/σD and RA/RD, recently observed by HERMES Collaboration, can be explained in terms of the nuclear enhanced power corrections.
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