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    Updated lattice results for parton distributions

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    Genre
    Journal Article
    Date
    2017-07-01
    Author
    Alexandrou, C
    Cichy, K
    Constantinou, M
    Hadjiyiannakou, K
    Jansen, K
    Steffens, F
    Wiese, C
    Subject
    hep-lat
    hep-lat
    hep-ph
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5693
    
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    DOI
    10.1103/PhysRevD.96.014513
    Abstract
    © 2017 American Physical Society. We provide an analysis of the x dependence of the bare unpolarized, helicity, and transversity isovector parton distribution functions (PDFs) from lattice calculations employing (maximally) twisted mass fermions. The x dependence of the calculated PDFs resembles the one of the phenomenological parameterizations, a feature that makes this approach very promising. Furthermore, we apply momentum smearing for the relevant matrix elements to compute the lattice PDFs and find a large improvement factor when compared to conventional Gaussian smearing. This allows us to extend the lattice computation of the distributions to higher values of the nucleon momentum, which is essential for the prospects of a reliable extraction of the PDFs in the future.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review D
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5675
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