Non-collinearity in high energy processes

    Research output: Contribution to JournalArticleAcademicpeer-review

    200 Downloads (Pure)


    We discuss the treatment of intrinsic transverse momenta in high energy scattering processes. Within the field theoretical framework of QCD, the process is described in terms of correlators containing quark and gluon fields. The correlators, parametrized in terms of distribution and fragmentation functions, contain matrix elements of nonlocal field configurations requiring a careful treatment to assure colour gauge invariance. It leads to nontrivial gauge links connecting the parton fields. For the transverse momentumdependent correlators the gauge links give rise to time reversal odd phenomena, showing up as single spin and azimuthal asymmetries. The gauge links, arising from multi-gluon initial and final state interactions, depend on the colour flow in the process, challenging universality. © Indian Academy of Sciences.
    Original languageEnglish
    Pages (from-to)83-95
    JournalPramana: Journal of Physics
    Issue number1
    Publication statusPublished - 2009

    Bibliographical note

    Times Cited: 0


    Dive into the research topics of 'Non-collinearity in high energy processes'. Together they form a unique fingerprint.

    Cite this