Non-universality of transverse momentum dependent parton distribution functions

C.J. Bomhof, P.J.G. Mulders

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    Abstract

    In the field theoretical description of hadronic scattering processes, single transverse-spin asymmetries arise due to gluon initial and final state interactions. These interactions lead to process dependent Wilson lines in the operator definitions of transverse momentum dependent parton distribution functions. In particular for hadron-hadron scattering processes with hadronic final states this has important ramifications for possible factorization formulas in terms of (non)universal TMD parton distribution functions. In this paper we will systematically separate the universality-breaking parts of the TMD parton correlators from the universal T-even and T-odd parts. This might play an important role in future factorization studies for these processes. We also show that such factorization theorems will (amongst others) involve the gluonic pole cross sections, which have previously been shown to describe the hard partonic scattering in weighted spin asymmetries. © 2007 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)409-427
    JournalNuclear Physics B
    Volume795
    Issue number1-2
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Times Cited: 13

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