TY - CONF AU - Boer, Daniel TI - Theoretical aspects of spin physics IS - hep-ph/0312149 CY - Hamburg PB - Deutsches Elektronen-Synchrotron, DESY M1 - PUBDB-2015-04434 M1 - hep-ph/0312149 SP - 77-86 PY - 2003 AB - A summary is given of how spin enters in collinearly factorizing processes. Next, theoretical aspects of polarization in processes beyond collinear factorization are discussed in more detail, with special focus on recent developments concerning the color gauge invariant definitions of transverse momentum dependent distribution and fragmentation functions, such as the Sivers and Collins effect functions. This has particular relevance for azimuthal single spin asymmetries, which currently receive much theoretical and experimental attention. T2 - Ringberg Workshop on New Trends in HERA Physics 2003 CY - 28 Sep 2003 - 3 Oct 2003, Ringberg Castle (Germany) Y2 - 28 Sep 2003 - 3 Oct 2003 M2 - Ringberg Castle, Germany KW - talk: Tegernsee 2003/09/28 (INSPIRE) KW - electron p: deep inelastic scattering (INSPIRE) KW - electron p: inclusive reaction (INSPIRE) KW - polarization (INSPIRE) KW - structure function: spin (INSPIRE) KW - p p: inclusive reaction (INSPIRE) KW - hadron: electroproduction (INSPIRE) KW - hadron: hadroproduction (INSPIRE) KW - spin: asymmetry (INSPIRE) KW - angular distribution: asymmetry (INSPIRE) KW - polarization: transverse (INSPIRE) KW - factorization (INSPIRE) KW - quantum chromodynamics (INSPIRE) KW - effect: higher-twist (INSPIRE) KW - quark: transverse momentum (INSPIRE) KW - quark: polarization (INSPIRE) LB - PUB:(DE-HGF)8 ; PUB:(DE-HGF)15 UR - https://bib-pubdb1.desy.de/record/276117 ER -