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    Left-right spin asymmetry in N↑ →hX

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    Genre
    Journal Article
    Date
    2014-10-09
    Author
    Gamberg, L
    Kang, ZB
    Metz, A
    Pitonyak, D
    Prokudin, A
    Subject
    hep-ph
    hep-ph
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5853
    
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    DOI
    10.1103/PhysRevD.90.074012
    Abstract
    © 2014 American Physical Society. We consider the inclusive production of hadrons in lepton-nucleon scattering. For a transversely polarized nucleon this reaction shows a left-right azimuthal asymmetry, which we compute in twist-3 collinear factorization at leading order in perturbation theory. All nonperturbative parton correlators of the calculation are fixed through information from other hard processes. Our results for the left-right asymmetry agree in sign with recent data for charged pion production from the HERMES Collaboration and from Jefferson Lab. However, the magnitude of the computed asymmetries tends to be larger than the data. Potential reasons for this outcome are identified. We also give predictions for future experiments and highlight in particular the unique opportunities at an electron ion collider.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review D - Particles, Fields, Gravitation and Cosmology
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5835
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