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    Towards an explanation of transverse single-spin asymmetries in proton-proton collisions: The role of fragmentation in collinear factorization

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    Genre
    Journal Article
    Date
    2014-06-05
    Author
    Kanazawa, K
    Koike, Y
    Metz, A
    Pitonyak, D
    Subject
    hep-ph
    hep-ph
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5877
    
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    DOI
    10.1103/PhysRevD.89.111501
    Abstract
    We study the transverse single-spin asymmetry for single-hadron production in proton-proton collisions within the framework of collinear twist-3 factorization in quantum chromodynamics. By taking into account the contribution due to parton fragmentation, we obtain a very good description of all high transverse-momentum data for neutral and charged pion production from the Relativistic Heavy Ion Collider. Our study may provide the crucial step toward a final solution to the long-standing problem of what causes transverse single-spin asymmetries in hadronic collisions within quantum chromodynamics. We show for the first time that it is possible to simultaneously describe spin/azimuthal asymmetries in proton-proton collisions, semi-inclusive deep-inelastic scattering, and electron-positron annihilation by using collinear twist-3 factorization in the first process along with transverse-momentum- dependent functions extracted from the latter two reactions. © 2014 American Physical Society.
    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/5859
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