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Light-cone PDFs from Lattice QCD

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arxiv 1811.01588 v1 pith:UTIZRSUI submitted 2018-11-05 hep-lat

Constantia Alexandrou , Krzysztof Cichy , Martha Constantinou , Kyriakos Hadjiyiannakou , Karl Jansen , Aurora Scapellato , Fernanda Steffens This is my paper · ORCID
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keywords pdfslatticeanalysisapproachexcitedlight-conequasi-pdfsstates
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Using the approach proposed a few years ago by X. Ji, it has become feasible to extract parton distribution functions (PDFs) from lattice QCD, a task thought to be extremely difficult before Ji's proposal. In this talk, we discuss this approach, in particular different systematic effects that need to be controlled to ultimately have precise determinations of PDFs. Special attention is paid to the analysis of excited states. We emphasize that it is crucial to control excited states contamination and we show an analysis thereof for our lattice data, used to calculate quasi-PDFs and finally light-cone PDFs in the second part of this proceeding (C. Alexandrou et al., Quasi-PDFs from Twisted mass fermions at the physical point).

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